Thermal cascade system for distributed household refrigeration system

ABSTRACT

A distributed refrigeration appliance system in a residential kitchen and other locations in a dwelling including multiple separate refrigeration appliance modules, a central cooling system and a cooling circuit. The system can also include one or more satellite stations having a heat exchanger and arranged for supplying chilled air to one or more refrigeration appliance modules. One or more refrigeration appliance modules can include a thermal cascade cooling device to cool the module to lower temperatures than the cooling circuit can attain. One or more refrigeration appliance modules can be refrigeration/storage modules that can provide refrigerated, unconditioned or heated storage space. The central cooling system can be a vapor compression system having a refrigerant circuit connecting the modules. Alternately, the central cooling system can cool a secondary cooling medium circuit. The refrigeration system can also have more than one refrigeration machine providing cooling to the secondary refrigeration loop.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of prior filed application Ser. No.11/769,837 filed on Jun. 28, 2007 which is a continuation in part ofprior filed application Ser. Nos. 11/646,754 and 11/646,972 filed onDec. 28, 2006. This application is related to patent application Ser.Nos. 11/769,811; 11/769,864; 11/769,935, now U.S. Pat. No. 8,042,355;Ser. No. 11/769,903, now U.S. Pat. No. 8,161,760; Ser. Nos. 11/769,989;11/770,033, now U.S. Pat. No. 8,061,153 and 13,432,047.

BACKGROUND OF THE INVENTION

(1) Field of the Invention

The invention relates to refrigeration appliances for use in residentialkitchens and other locations associated with a dwelling.

(2) Description of Related Art

Refrigeration appliances for use in residential kitchens and other roomsin a dwelling unit are known. Modular refrigeration devices such asrefrigerator, freezer, ice maker and wine cooler modules for use inresidential dwellings are known.

BRIEF SUMMARY OF THE INVENTION

The invention relates to a distributed refrigeration appliance systemconstructed and arranged for use in a residential kitchen and otherlocations associated with a dwelling and having separate refrigerationappliance modules including an insulated cabinet and at least oneinsulated door and an apparatus for receiving a cooling medium forprimary stage cooling of the interior of the refrigerating module. Thedistributed refrigeration appliance system can also include a centralcooling unit removing heat from the cooling medium, a cooling mediumcircuit connecting the central cooling unit and the refrigerationappliance modules to supply the cooling medium from the central coolingunit to the plurality of refrigeration appliance modules and to returnthe cooling medium to the central cooling unit from the refrigerationappliance modules for primary stage cooling of the refrigerationappliance modules, and cooling medium flow control devices connected inthe cooling medium circuit for controlling flow of the cooling medium toeach of the refrigeration appliance modules. At least one of therefrigeration appliance modules can have a thermal cascade coolingsystem to cool at least a portion of the at least one refrigerationappliance module to a lower temperature than can be achieved in theprimary stage cooling of the at least one refrigeration appliancemodule.

The central cooling unit can be selected from the group consisting of avapor compression cooling system, an absorption cooling system and aStirling cycle cooling system. The thermal cascade cooling system can beselected from the group of a vapor compression cooling system, athermoelectric cooling system and a Stirling cycle cooling system. Thecooling medium can be a refrigerant, a liquid coolant or chilled air.

In another aspect the invention relates to a distributed refrigerationappliance system constructed and arranged for use in a residentialkitchen and other locations associated with a dwelling having separaterefrigeration appliance modules each including an insulated cabinet andat least one insulated door, a heat exchanger for receiving liquidcoolant for primary stage cooling of the interior of the refrigerationappliance modules, a central cooling unit for chilling the liquidcoolant, a liquid coolant circuit connecting the central cooling unitand the plurality of refrigeration appliance module heat exchangers tosupply chilled liquid coolant from the central cooling unit to theplurality of refrigeration appliance modules heat exchangers, and toreturn liquid coolant to the central cooling unit from the refrigerationappliance module heat exchangers for primary stage cooling of therefrigeration appliance modules to temperatures above 0° C., and aplurality of coolant control valves connected in the liquid coolantcircuit for controlling flow of chilled liquid coolant to therefrigeration appliance module heat exchangers to control thetemperatures in the respective refrigeration appliance modules. At leastone of the refrigeration appliance modules can have two compartmentswith the heat exchanger arranged for communication with a firstcompartment for primary stage cooling to temperatures above 0° C. andfurther can have a thermal cascade cooling system to cool the secondcompartment to temperatures above and below 0° C.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic drawing illustrating a modular distributedrefrigeration appliance system according to the invention.

FIG. 2 is a schematic drawing illustrating another embodiment of amodular distributed refrigeration appliance system according to theinvention.

FIG. 3 is a schematic drawing illustrating another embodiment of amodular distributed refrigeration appliance system according to theinvention.

FIG. 4 is a schematic drawing illustrating another embodiment of amodular distributed refrigeration appliance system according to theinvention.

FIG. 5 is a schematic drawing illustrating a refrigeration appliancemodule that can be used in combination with a modular distributedrefrigeration appliance system according to the invention.

FIG. 6 is a schematic drawing illustrating another embodiment of amodular distributed refrigeration system incorporating satellitestations according to the invention.

FIG. 7A is a partial schematic drawing illustrating another embodimentof refrigeration appliance modules that can be used in combination withthe modular distributed refrigeration system illustrated in FIG. 6.

FIG. 7B is a partial schematic drawing illustrating another embodimentof refrigeration appliance modules that can be used in combination withthe modular distributed refrigeration system illustrated in FIG. 6.

FIG. 7C is an enlarged partial schematic drawing illustrating a fan tocontrol air flow between compartments of a refrigeration appliancemodule as illustrated in FIG. 7B.

FIG. 8A is a partial schematic drawing illustrating another embodimentof refrigeration appliance modules that can be used in combination withthe modular distributed refrigeration system illustrated in FIG. 6.

FIG. 8B is a partial schematic drawing illustrating another embodimentof refrigeration appliance modules that can be used in combination withthe modular distributed refrigeration system illustrated in FIG. 6.

FIG. 9 is a partial schematic drawing illustrating another embodiment ofrefrigeration appliance modules that can be used in combination with themodular distributed refrigeration system illustrated in FIG. 6.

FIG. 10 is a schematic drawing illustrating another embodiment of amodular distributed refrigeration system incorporating satellitestations according to the invention.

FIG. 11 is a schematic drawing illustrating another embodiment of amodular distributed refrigeration appliance system incorporating acascade cooling system for a module according to the invention.

FIG. 12 is a schematic drawing illustrating another embodiment of amodular distributed refrigeration appliance system incorporating acascade cooling system for a module according to the invention.

FIG. 13 is a schematic drawing illustrating another embodiment of amodular distributed refrigeration appliance system incorporating acascade cooling system for a module according to the invention.

FIG. 14 is a schematic drawing illustrating another embodiment of amodular distributed refrigeration appliance system incorporating acascade cooling system for a module according to the invention.

FIG. 15 is a schematic drawing illustrating a modular distributedrefrigeration appliance system incorporating another embodiment of acascade cooling system for a module according to the invention.

FIG. 16 is a schematic drawing illustrating another embodiment of amodular distributed refrigeration appliance system incorporating acascade cooling system for a module according to the invention.

FIG. 17A is a schematic drawing illustrating a modular distributedrefrigeration appliance system similar to the embodiment illustrated inFIG. 12 incorporating another embodiment of a cascade cooling accordingto the invention.

FIG. 17B is a schematic drawing illustrating a modular distributedrefrigeration appliance system similar to the embodiment illustrated inFIG. 12 incorporating another embodiment of a cascade cooling accordingto the invention.

FIG. 18 is a partial schematic drawing illustratingrefrigeration/storage modules that can be used in a modular distributedrefrigeration system such as illustrated in FIGS. 3 and 6.

FIG. 19 is a partial schematic drawing illustrating another embodimentof refrigeration/storage modules that can be used in a modulardistributed refrigeration system such as illustrated in FIGS. 3 and 6.

FIG. 20 is a partial schematic drawing illustrating another embodimentof refrigeration/storage modules that can be used in a modulardistributed refrigeration system such as illustrated in FIGS. 3 and 6.

FIG. 21 is a schematic drawing illustrating another embodiment of amodular refrigeration system according to the invention.

FIG. 22 is a schematic drawing illustrating another embodiment of amodular refrigeration system according to the invention.

FIG. 23A is a schematic drawing illustrating another embodiment ofrefrigeration/storage modules that can be used in a distributedrefrigeration system according to the invention.

FIG. 23B is a schematic drawing illustrating another embodiment ofrefrigeration/storage modules that can be used in a distributedrefrigeration system according to the invention.

FIG. 24 is a schematic drawing illustrating another embodiment of arefrigeration/storage module that can be used in a distributedrefrigeration system according to the invention.

FIG. 25 is a schematic drawing illustrating another embodiment of amodular refrigeration system according to the invention.

FIG. 26 is a schematic drawing illustrating another embodiment of amodular refrigeration system according to the invention.

FIGS. 27A-27D are illustrations of temperature sequence cycles that canbe provided in refrigeration/storage module according to the invention.

FIG. 28 is a schematic drawing illustrating a distributed refrigerationsystem according to the invention installed in a schematic floor plan ofa dwelling.

FIG. 28A is an enlarged schematic drawing illustrating connection of amodule to a supply and return system.

FIG. 29 is a schematic drawing illustrating another embodiment of adistributed refrigeration system according to the invention installed ina schematic floor plan of a dwelling.

FIG. 29A is an enlarged schematic drawing illustrating connection of amodule to a single line system.

DETAILED DESCRIPTION OF THE INVENTION

In a modular kitchen with multiple refrigeration modules therefrigeration system to cool the modules is a challenging problem. Thesimplest approach would be to have individual complete refrigerationsystems for each module. In early phases of modularity for residentialkitchens this might be the approach taken, especially when modularrefrigeration product choices are few and economies of scale are notavailable. However, as modularity becomes more mainstream and kitchendesigns begin to incorporate modular refrigeration products withappropriate infrastructure it will become desirable to have a singlecentral cooling system from cost, manufacturing and energy efficiencyperspectives. Consumers will be primarily interested in energyefficiency, cost, flexibility and expandability offered by a modularrefrigeration appliance system with less concern about the centralcooling technology to support the modular system.

According to the invention, a modular refrigeration appliance system canbe provided for a residential kitchen and other locations associatedwith a dwelling that can include a central cooling unit for some or allthe refrigerating modules that a consumer may desire to include in theirkitchen, either at the time of construction, or to expand or changerefrigerating modules over time as needs or desires change. A modularkitchen could allow consumers to select multiple refrigeration modulesfitting their lifestyles the best with ultimate flexibility in theirkitchens and totally customizable kitchens with modular appliances notonly for refrigeration but also for food preparation and kitchenclean-up. According to the invention a single, variable capacity centralcooling unit can be provided that is capable of matching the coolingneed to the aggregate heat load of the refrigerating modules. Thecentral cooling unit can be arranged to run continuously by controllingthe volume of cooling medium directed to each refrigerating module sothat each module will be cooled to a user selected temperature andmaintained at the desired temperature accurately. The cooling medium canbe cold air, refrigerant or a liquid coolant such as an ethylene glycoland water solution. The central cooling unit can be a vapor compressionsystem, but is not limited to that. If a central cooling unit is a vaporcompression cooling system the central cooling unit can have a variablecapacity compressor capable of handling the cooling load from multiplerefrigerating module products. Refrigerating module products can includeabove freezing refrigerator modules, below freezing freezer modules,refrigerator freezer modules having above freezing and below freezingcompartments in various configurations that can include, but are notlimited to, built in, stackable, under counter or drawer configurations.Also, refrigerating module products could include specific purposemodules such as ice maker, wine cooler and bar refrigerator units. Inaddition, conventional refrigeration products having a completerefrigeration system can be combined with a modular refrigerationappliance system according to the invention. For example, one or morebelow freezing freezer units can be combined with a modularrefrigeration system appliance arranged for a plurality of fresh foodabove freezing refrigerator modules. As will be described in more detailbelow, a hybrid approach can be an energy efficient approach toproviding cooling for modular products since the central cooling unitcan run under more favorable cooling cycle conditions since a very cold,i.e. below 0° F., cooling medium would not be required.

Turning to FIG. 1, in one embodiment of the invention, illustrated inschematic form, refrigerating modules 20 and 22 can be connected in arefrigeration appliance system that can include a central cooling unit10. In the embodiment illustrated in FIG. 1 two refrigerating modules20, 22 are illustrated. According to the invention more than one or morethan two refrigerating modules can be provided in the refrigerationappliance system as desired and although two or three refrigeratingmodules are included in the disclosed embodiments, they should beunderstood to include the possibility of one or more than two or threerefrigerating modules within the scope of the invention. In addition,the refrigeration appliance system can be arranged to permit expansionof the refrigeration appliance system subsequent to initial installationby adding additional refrigerating modules as a user's needs change overtime requiring new or additional refrigerating modules. In practicerefrigerating modules 20, 22 can be installed in a residential kitchenand/or in adjoining or nearby rooms such as a great room, bar,recreation room and/or other locations associated with a dwelling.Central cooling unit 10 can be installed in a nearby location such as abasement, utility room, garage, outside, or, if desired, in the kitchenin the proximity of some or all of the refrigeration appliance modulesdepending on the style of dwelling and whether a basement or crawl spaceis available or desired for installation of the central cooling unit 10.Refrigerating modules 20, 22 can be free standing or built in modulesand can be general purpose refrigerator or freezer modules, or can bespecial purpose modules such as an ice maker or a wine cooler.Refrigerating modules 20, 22 can take of the form of a conventionalrefrigerator or freezer cabinet having a hinged door, or can take theform of a refrigerator drawer appliance such as disclosed in co-pendingnon-provisional application Ser. No. 11/102,321 filed Apr. 8, 2005 fullyincorporated herein by reference.

Refrigerating module 20 can have an insulated cabinet 24 and aninsulated door 25 that can be hinged to insulated cabinet 24 toselectively open and close an opening 28 in insulated cabinet 24.Refrigerating module 22 can have an insulating cabinet 26 and aninsulated door 27 that can be hinged to insulated cabinet 26 toselectively open and close an opening 29 in insulated cabinet 26. Thoseskilled in the art will understand that insulated doors 25 and 27 can beprovided with a suitable handle, not shown, to facilitate opening andclosing insulated doors 25 and 27. Refrigerating modules 20 and 22 caneach have a heat exchanger 30 positioned in the insulated cabinets 24and 26 respectively. Similarly, refrigerating modules 20 and 22 can havea variable speed heat exchanger fan 32 positioned to circulate air(illustrated by air flow arrows 38) over the respective heat exchangers30 and through the respective refrigerating modules 20, 22. Thoseskilled in the art will appreciate that a single speed fan can be usedinstead of a variable speed fan 32. Refrigerating modules 20, 22 canalso have a temperature sensor 34 arranged to sense the temperature ofthe interior of refrigerating modules 20, 22. Temperature sensor 34 canbe a thermister or other well known electronic or mechanical temperaturesensing mechanism or device. Temperature selectors 36 can be providedfor each of the refrigerating modules 20, 22 to allow the user to selectthe operating temperature for the respective refrigerating modules 20,22. While temperature selectors 36 are illustrated schematically spacedfrom refrigerating modules 20, 22, those skilled in the art willunderstand that temperature selectors 36 can be located in each of therefrigerating modules 20, 22 as is well known in the art, or could becentrally located if desired. Temperature selectors 36 can comprise awell known mechanical or electronic selector mechanism to allow a userto select an operating temperature for the respective refrigeratingmodules 20, 22.

The refrigeration appliance system illustrated in schematic form in FIG.1 also includes a central cooling unit 10. Central cooling unit 10 caninclude a variable speed compressor 12, a condenser 14, and an expansiondevice 18 connected in a refrigerating circuit with a chilled liquidevaporator 40. A variable speed condenser fan 16 can be provided tocirculate air over condenser 14. Chilled liquid evaporator 40 can be ashell and tube evaporator also known as a secondary loop evaporator.Expansion device 18 can be an expansion device with feedback arranged tocontrol refrigerant flow through expansion device 18 based on the heatload in the refrigeration appliance system. Central cooling unit 10 canbe connected to the refrigerating modules 20, 22 with insulated conduits42 forming a cooling medium circuit for conveying liquid coolant fromchilled liquid evaporator 40 to heat exchangers 30 and from heatexchangers 30 to chilled liquid evaporator 40. Liquid coolant, notshown, contained in chilled liquid evaporator 40, insulated conduits 42and heat exchangers 30 can be circulated by a pump 44 that can be avariable speed pump. Further, each refrigerating module can have a valve46 to control flow of liquid coolant into the heat exchanger 30. Valves46 can be on-off valves to allow or prevent flow of liquid coolantthrough the heat exchanger 30 for a refrigerating module. Those skilledin the art will appreciate that if a single speed heat exchanger fan 32is used in a refrigerating module 20, 22 an adjustable valve 46 can beused to control the amount of liquid coolant flowing into a heatexchanger 30, although it can be more energy efficient to use a variablespeed heat exchanger fan 32, a variable speed pump 44 and an on-offvalve 46 to control the temperature in the respective refrigeratingmodules 20, 22. Central cooling unit 10 can also have a microprocessorbased controller 50 having a first portion 52 that can be arranged tocontrol the operation of central cooling unit 10 and a second portion 54arranged to control the volume of liquid coolant directed to therespective refrigerating modules 20, 22. A control circuit 56 can beprovided to connect the temperature sensors 34, the temperatureselectors 36, the variable speed compressor 12, the variable speedcondenser fan 16, the expansion device 18, pump 44, valves 46 and heatexchanger fans 32 with controller 50. Thus, a refrigeration appliancesystem according to the invention is illustrated in FIG. 1 as adistributed refrigeration system that can have a variable capacity vaporcompression condensing unit and secondary loop utilizing a chilledliquid evaporator network. One example of a liquid coolant that can beused is DYNALENE HC heat transfer fluid, a water-based organic salt thatis non-toxic, non-flammable with low viscosity, although those skilledin the art will understand that other liquid coolant solutions such asan ethylene glycol and water solution can be used as desired.

According to the invention, central cooling unit 10 can be continuouslyoperating so that chilled liquid at an adequate temperature to achievethe lowest selected temperature in the refrigeration appliance system iscontinuously circulated in insulated conduits 42 forming a coolingmedium circuit from chilled liquid evaporator 40 to refrigeratingmodules 20, 22. Controller 50 can be arranged to adjust the capacity ofthe central cooling unit 10 in response to the aggregate cooling load ofthe plurality of refrigerating modules 20, 22. As noted above, while tworefrigerating modules 20, 22 are illustrated in FIG. 1, according to theinvention one or more than two refrigerating modules can be connected inthe refrigerating appliance system. The aggregate cooling load can bedetermined by the first portion 52 of controller 50 as a function oftemperatures sensed by temperature sensors 34, operating temperaturesselected by temperature selectors 36, and feedback from expansion device18. Controller 50 can also be arranged to control the operatingtemperature in each of the refrigerating modules 20, 22. Second portion54 of controller 50 can be arranged to control valves 46 and heatexchanger fans 32 to maintain the selected operating temperatures in therespective refrigerating modules based on the settings of temperatureselectors 36 and temperature sensors 34. Thus, according to theinvention, a single continuously operating variable capacity centralcooling unit 10 can be provided for a plurality of refrigerating modules20, 22 that can be set to operate at different operating temperatures.The variable capacity central cooling unit 10 can be arranged forchilling a cooling medium. A cooling medium circuit, insulated conduits42, can be provided connecting the central cooling unit 10 to supply acooling medium from the central cooling unit 10 to the plurality ofrefrigerating modules 20, 22. A plurality of cooling medium flow controldevices, valves 46, can be connected in the cooling medium circuit,insulated conduits 42, for controlling flow of cooling medium to each ofthe refrigerating modules 20, 22. A controller 50 and control circuit 56can be provided to adjust the capacity of the variable capacity centralcooling unit 10 in order to supply sufficient cooling medium to cool theplurality of refrigerating modules 20,22 to the respective selectedoperating temperatures, and the controller 50 and control circuit 56 canbe arranged to adjust the volume of cooling medium directed torespective ones of the refrigerating modules 20, 22 by controlling thecooling medium flow control devices, valves 46, to maintain the selectedoperating temperature in the respective refrigerating modules 20, 22.Controller 50 can control the speed of variable speed pump 44 to varythe volume of liquid cooling in the cooling medium circuit, insulatedconduits 42, and controller 50 can control the speed of variable speedheat exchanger fans 32 to further control the operating temperature inthe respective refrigerating modules 20, 22.

Turning to FIG. 2, in another embodiment of the invention, illustratedin schematic form, refrigerating modules 70 and 72 can be connected in arefrigeration appliance system that can include a central cooling unit60. Similar to the embodiment illustrated in FIG. 1, two refrigeratingmodules 70, 72 are illustrated. According to the invention one or morethan two refrigerating modules can be provided in the refrigerationappliance system as desired. Refrigerating modules 70, 72 can be freestanding or built in modules and can be general purpose refrigerator, orcan be special purpose modules. Refrigerating module 70 can have aninsulated cabinet 74 and an insulated door 75 that can be hinged toinsulated cabinet 74 to selectively open and close opening 78 ininsulated cabinet 74. Refrigerating module 72 can have an insulatingcabinet 76 and an insulated door 77 that can be hinged to insulatedcabinet 76 to selectively open and close opening 79 in insulated cabinet76. Those skilled in the art will understand that insulated doors 75 and77 can be provided with a suitable handle, not shown, to facilitateopening and closing insulated doors 75 and 77. Refrigerating modules 70,72 can have a temperature sensor 84 arranged to sense the temperature ofthe interior of refrigerating modules 70, 72. Temperature sensor 84 canbe a thermister or other well known electronic or mechanical temperaturesensing mechanism or device. Temperature selectors 86 can be providedfor each of the refrigerating modules 70, 72 to allow the user to selectthe operating temperature for the respective refrigerating modules 70,72. While temperature selectors 86 are illustrated schematically spacedfrom refrigerating modules 70, 72, a temperature selector 86 can belocated in each of the refrigerating modules 70, 72 as is well known inthe art, or can be centrally located if desired. Temperature selectors86 can comprise a well known mechanical or electronic selector mechanismto allow a user to select an operating temperature for the respectiverefrigerating modules 70, 72.

The refrigeration appliance system illustrated in schematic form in FIG.2 also includes a central cooling unit 60. Central cooling unit 60 caninclude a variable speed compressor 62, a condenser 64 and an expansiondevice 68 connected in a refrigerating circuit with an evaporator 90. Avariable speed condenser fan 66 can be provided to circulate air overcondenser 64. Evaporator 90 can be a tube and fin evaporator for coolingair that can be used as the cooling medium in the embodiment of FIG. 2.Expansion device 68 can be an expansion device with feedback arranged tocontrol flow through the expansion device 68 based on the heat load inthe refrigeration appliance system including the refrigerating modules70, 72. Central cooling unit 60 can be connected to the refrigeratingmodules 70, 72 with insulated ducts 92 forming a cooling medium circuitfor conveying chilled air from evaporator 90 to refrigerating modules70, 72. Chilled air can be circulated by an evaporator fan 94 that canbe a variable speed fan. Air inlets 93 can lead from the insulated ducts92 to the respective refrigerating modules 70, 72, and air outlets 95can lead from the respective refrigerating modules 70, 72 to the airducts 92. Air inlets 93 and air outlets 95 form the apparatus forreceiving the cooling medium, chilled air, in the refrigerating modules70, 72. Air inlets 93 and air outlets 95 can be positioned with respectto insulated cabinets 74, 76 to provide a desired chilled air flowpattern in the respective refrigerating modules 70, 72. Air flow arrows80 schematically illustrate the air flow in the insulated cabinets 74,76. Further, each refrigerating module 70, 72 can have a baffle 96 tocontrol flow of chilled air through air inlets 93 into the respectiverefrigerating modules 70, 72. Baffles 96 can be on-off or variable tocontrol flow of chilled air through a refrigerating module. Baffles 96can be adjustable between open and closed positions to permit or blockflow of chilled air into the respective refrigerating modules 70, 72 andvariable speed evaporator fan 94 can vary the flow of chilled air intothe respective refrigerating modules 70, 72. Baffles 96 can also bevariably movable between open and closed positions to permit, block andvary the flow of chilled air into the respective refrigerating modules70, 72. Central cooling unit 60 can have a microprocessor basedcontroller 100 having a first portion 102 that can be arranged tocontrol the operation of central cooling unit 60 and a second portion104 to control the volume of chilled air directed to the respectiverefrigerating modules 70, 72 similar to controller 50 in the embodimentof FIG. 1. A control circuit 106 can be provided to connect thetemperature sensors 84, the temperature selectors 86, the variable speedcompressor 62, the variable speed condenser fan 66, the expansion device68, evaporator fan 94, and baffles 96 to controller 100. Thus, arefrigeration appliance system according to the invention is illustratedin FIG. 2 as a distributed refrigeration system having a variablecapacity vapor compression condensing unit and a chilled forced aircooling delivery network.

According to the invention, central cooling unit 60 can be continuouslyoperating so that chilled air is continuously circulated in insulatedducts 92 forming a cooling medium circuit from evaporator 90 torefrigerating modules 70, 72 and back to evaporator 90. Controller 100can be arranged to adjust the capacity of the central cooling unit 60 inresponse to the aggregate cooling load of the plurality of refrigeratingmodules 70, 72. As noted above, while two refrigerating modules 70, 72are illustrated in FIG. 2, according to the invention one or more thantwo refrigerating modules can be connected in the refrigeratingappliance system. The aggregate cooling load can be determined by thefirst portion 102 of controller 100 as a function of temperatures sensedby temperature sensors 84, operating temperatures selected withtemperature selectors 86, and feedback from expansion device 68.Controller 100 can also be arranged to control the operating temperaturein each of the refrigerating modules 70, 72. Second portion 104 ofcontroller 100 can be arranged to control baffles 96 and evaporator fan94 to maintain the selected operating temperatures based on the settingsof temperature selectors 86 and temperature sensors 84. Thus, accordingto the invention, a single continuously operating variable capacitycentral cooling unit 60 can be provided for a plurality of refrigeratingmodules 70, 72 that can be set to operate at different operatingtemperatures. The variable capacity central cooling unit 60 can bearranged for chilling a cooling medium. A cooling medium circuit,insulated ducts 92, can be provided connecting the central cooling unit60 to supply the cooling medium from the central cooling unit 60 to theplurality of refrigerating modules 70, 72. A plurality of cooling mediumflow control devices, baffles 96, can be provided for controlling flowof cooling medium, chilled air, to each of the refrigerating modules 70,72, through air inlets 93 and air outlets 95. A controller 100 andcontrol circuit 106 can be provided to adjust the capacity of thevariable capacity central cooling unit 60 in order to supply sufficientcooling medium to cool the plurality of refrigerating modules 70, 72 tothe respective selected operating temperatures, and the controller 100and control circuit 106 can be arranged to adjust the volume of coolingmedium directed to respective ones of the refrigerating modules 70, 72by controlling the cooling medium flow control devices, evaporator fan94 and baffles 96, to maintain the selected operating temperature in therespective refrigerating modules 70, 72. Controller 100 can control thespeed of variable speed fan 94 to vary the volume of cooling medium,chilled air, in the cooling medium circuit, insulated ducts 92, tofurther control the operating temperature in the respectiverefrigerating modules 70, 72. The embodiment of FIG. 2 is preferablyused for above freezing refrigerator modules to avoid the need tocirculate chilled air in the cooling medium circuit to achievetemperatures approximating 0° F. for freezer modules, although freezermodules can be included in the FIG. 2 embodiment if desired.

Turning to FIG. 3, in another embodiment of the invention, illustratedin schematic form, refrigerating modules 120, 122 and 124 can beconnected in a refrigeration appliance system that can include a centralcooling unit 110. According to the invention one refrigerating module ormore than three refrigerating modules can be provided in therefrigeration appliance system as desired. Refrigerating modules 120,122 and 124 can be free standing or built in modules and can be generalpurpose refrigerator, freezer or can be special purpose modules.Refrigerating module 120 can have an insulated cabinet 126 and aninsulated door 127 that can be hinged to insulated cabinet 126 toselectively open and close an opening 135 in insulated cabinet 126.Refrigerating module 122 can have an insulated cabinet 128 and aninsulated door 129 that can be hinged to insulated cabinet 128 toselectively open and close an opening 137 in insulated cabinet 128.Refrigerating module 124 can have an insulated cabinet 140 and aninsulated door 141 to selectively open and close an opening 139 ininsulated cabinet 140. Those skilled in the art will understand thatinsulated doors 127, 129 and 141 can be provided with a suitable handle,not shown, to facilitate opening and closing insulated doors 127, 129and 141. Refrigerating modules 120, 122, and 124 can include arefrigerating module evaporator 130 and a refrigerating module variablespeed evaporator fan 132 arranged to circulate chilled air in therespective refrigerating modules. Air flow arrows 148 schematicallyillustrate the chilled air flow in the respective refrigerating modules.Refrigerating modules 120, 122 and 124 can have a temperature sensor 134arranged to sense the temperature of the interior of refrigeratingmodules 120, 122 and 124. Temperature sensor 134 can be a thermister orother well known electronic or mechanical temperature sensing mechanismor device. Temperature selectors 136 can be provided for each of therefrigerating modules 120, 122 and 124 to allow the user to select theoperating temperature for the respective refrigerating modules 120, 122and 124. While temperature selectors 136 are illustrated schematicallyspaced from refrigerating modules 120, 122 and 124 a temperatureselector 136 can be located in each of the refrigerating modules 120,122 and 124 as is well known in the art, or can be centrally located ifdesired. Temperature selectors 136 can comprise a well known mechanicalor electronic selector mechanism to allow a user to select an operatingtemperature for the respective refrigerating modules 120, 122 and 124.

The refrigeration appliance system illustrated in schematic form in FIG.3 also includes a central cooling unit 110. Central cooling unit 110 caninclude a variable speed compressor 112, a condenser 114 and a variablespeed condenser fan 116. Central cooling unit 110 can also include amanifold 117 and an accumulator 118. Central cooling unit 110 can beconnected to the refrigerating modules 120, 122 and 124 with refrigerantlines that can be insulated supply conduits 142 and insulated returnconduits 144 forming a cooling medium circuit for conveying refrigerantfrom central cooling unit 110 through manifold 117 to refrigeratingmodules 120, 122, and 124 and returning refrigerant from refrigeratingmodules 120, 122, and 124 to accumulator 118 through insulated returnconduits 144 for delivery to variable speed compressor 112.Refrigerating module evaporators 130 form the apparatus for receivingthe cooling medium, refrigerant, in the refrigerating modules 120, 122and 124. Further, each refrigerating module 120, 122 and 124 can have anexpansion device 138 to control flow of refrigerant into the respectiverefrigerating module evaporators 130. Expansion devices 138 can be anexpansion device with feedback arranged to control refrigerant flowthrough expansion device 138. Central cooling unit 110 can also have amicroprocessor based controller 150 having a first portion 152 that canbe arranged to control the operation of central cooling unit 110 and asecond portion 154 to control the volume of refrigerant directed to therespective refrigerating modules 120, 122 and 124 similar to controller50 in the embodiment of FIG. 1. A control circuit 156 can be provided toconnect the temperature sensors 134, the temperature selectors 136, thevariable speed compressor 112, the variable speed condenser fan 116,expansion devices 138 and evaporator fans 132 to controller 150. Thus, arefrigeration appliance system according to the invention is illustratedin FIG. 3 as a distributed refrigeration system having a variablecapacity vapor compression condensing unit and an evaporator network.Depending on the refrigerating modules selected, the modules can all beabove freezing, all below freezing, or a mixture of above freezing andbelow freezing refrigerating modules.

According to the invention, central cooling unit 110 can be continuouslyoperating so that refrigerant is continuously circulated in refrigerantlines that can be insulated supply conduits 142 and insulated returnconduits 144 forming a cooling medium circuit from condenser 114 throughmanifold 117 to refrigerating modules 120, 122 and 124 and back tocompressor 112 through accumulator 118. Controller 150 can be arrangedto adjust the capacity of the central cooling unit 110 in response tothe aggregate cooling load of the plurality of refrigerating modules120, 122 and 124. As noted above, while three refrigerating modules 120,122 and 124 are illustrated in FIG. 3, according to the invention one ormore than three refrigerating modules can be connected in therefrigerating appliance system. The aggregate cooling load can bedetermined by the first portion 152 of controller 150 as a function oftemperatures sensed by temperature sensors 134, operating temperaturesselected with temperature selectors 136 and feedback from expansiondevices 138. Controller 150 can also be arranged to control theoperating temperature in each of the refrigerating modules 120, 122 and124. Second portion 154 of controller 150 can be arranged to controlexpansion devices 138 and refrigerating module evaporator fans 132 tomaintain the selected operating temperatures based on the settings oftemperature selectors 136 and temperature sensors 134. Controller 150can be arranged to maintain approximately the same evaporator pressurein the refrigerating module evaporators 130 and control the temperaturein the respective refrigerating modules by varying the flow ofrefrigerant into the refrigerating module evaporators 130 andcontrolling the speed of the respective refrigerating module evaporatorfans 132. Thus, according to the invention, a single, continuouslyoperating variable capacity central cooling unit 110 can be provided fora plurality of refrigerating modules 120, 122 and 124 that can be set tooperate at different operating temperatures. The variable capacitycentral cooling unit 110 can be arranged for chilling a cooling medium,a refrigerant. A cooling medium circuit including refrigerant lines thatcan be insulated supply conduits and insulated return conduits 142, 144,can be provided connecting the central cooling unit 110 to supply thecooling medium from the central cooling unit 110 to the plurality ofrefrigerating modules 120, 122 and 124. A plurality of cooling mediumflow control devices, expansion devices 138, can be provided forcontrolling flow of cooling medium, refrigerant, to each of therefrigerating modules 120, 122 and 124. A controller 150 and controlcircuit 156 can be provided to adjust the capacity of the variablecapacity central cooling unit 110 in order to supply sufficient coolingmedium to cool the plurality of refrigerating modules 120, 122 and 124to the respective selected operating temperatures, and the controller150 and control circuit 156 can be arranged to adjust the volume ofcooling medium, refrigerant, directed to respective ones of therefrigerating modules 120, 122 and 124 by controlling the cooling mediumflow control devices, expansion devices 138 and refrigerating moduleevaporator fans 132, to maintain the selected operating temperature inthe respective refrigerating modules 120, 122 and 124. Controller 150can control the speed of variable speed compressor 112, variable speedcondenser fan 116 and expansion devices 138 to control the condensingand evaporating pressures of the cooling medium, refrigerant, in thecooling medium circuit including refrigerant lines that can be insulatedsupply and return conduits 142, 144, to further control the operatingtemperature in the respective refrigerating modules 120, 122 and 124.

Turning to FIG. 4, in another embodiment of the invention, illustratedin schematic form, refrigerating modules 120, 124 and 160 can beconnected in a refrigeration appliance system that can include a centralcooling unit 110. According to the invention one refrigerating module ormore than three refrigerating modules can be provided in therefrigeration appliance system as desired. As described in theembodiment disclosed in FIG. 3, refrigerating modules 120 and 124 can befree standing or built in modules and can be general purposerefrigerator, freezer or can be special purpose modules. Refrigeratingmodule 160 can be a refrigerator freezer having a refrigeratorcompartment 168 and a freezer compartment 166. Refrigerator compartment168 can have an insulated refrigerator compartment door 174 hinged toinsulated cabinet 162 and freezer compartment 166 can have an insulatedfreezer compartment door 172 hinged to insulated cabinet 162. Thoseskilled in the art will understand that insulated doors 127, 141, 172and 174 can be provided with a suitable handle, not shown, to facilitateopening and closing insulated doors 127, 141, 172 and 174. Refrigeratingmodules 120, 124 and 160 can include a refrigerating module evaporator130 and a variable speed refrigerating module evaporator fan 132arranged to circulate chilled air in the respective refrigeratingmodules, see air flow arrows 148. Refrigerating modules 120 and 124 canhave a temperature sensor 134 arranged to sense the temperature of theinterior of refrigerating modules 120, 124. Refrigerator freezer module160 can have a temperature sensor 134 for refrigerator compartment 168and a temperature sensor 134 for freezer compartment 166. Temperaturesensors 134 can be a thermister or other well known electronic ormechanical temperature sensing mechanism or device. Temperatureselectors 136 can be provided for each of the refrigerating modules 120and 124 to allow the user to select the operating temperature for therespective refrigerating modules 120 and 124. Refrigerator freezer 160can have two temperature selectors 136, one for the refrigeratorcompartment 168 and one for the freezer compartment 166. Whiletemperature selectors 136 are illustrated schematically spaced fromrefrigerating modules 120, 124 and 160 a temperature selector(s) 136 canbe located in each of the refrigerating modules 120, 124 and 160 as iswell known in the art, or alternately can be centrally located ifdesired. Temperature selectors 136 can comprise a well known mechanicalor electronic selector mechanism to allow a user to select an operatingtemperature for the respective refrigerating modules 120, 124 and 160.

The refrigeration appliance system illustrated in schematic form in FIG.4, similar to the embodiment illustrated in FIG. 3, can include acentral cooling unit 110. Central cooling unit 110 can include avariable speed compressor 112, a condenser 114 and a variable speedcondenser fan 116. Central cooling unit 110 can also include a manifold117 and an accumulator 118. Central cooling unit 110 can be connected tothe refrigerating modules 120, 124 and 160 with refrigerant lines thatcan be insulated supply conduits 142 and insulated return conduits 144forming a cooling medium circuit for conveying refrigerant from centralcooling unit 110 through manifold 117 to refrigerating modules 120, 124and 160 and returning refrigerant from refrigerating modules 120, 124and 160 to accumulator 118 through insulated return conduits 144 fordelivery to variable speed compressor 112. Refrigerating moduleevaporators 130 form the apparatus for receiving the cooling medium,refrigerant, in the refrigerating modules 120, 124 and 160. Further,each refrigerating module 120, 124 and 160 can have an expansion device138 to control flow of refrigerant into the respective refrigeratingmodule evaporators 130. Expansion devices 138 can be an expansion devicewith feedback arranged to control refrigerant flow through expansiondevice 138. Central cooling unit 110 can also have a microprocessorbased controller 150 having a first portion 152 that can be arranged tocontrol the operation of central cooling unit 110 and a second portion154 to control the volume of refrigerant directed to the respectiverefrigerating modules 120, 124 and 160 similar to microprocessor basedcontroller 50 in the embodiment of FIG. 1. A control circuit 156 can beprovided to connect the temperature sensors 134, the temperatureselectors 136, the variable speed compressor 112, the variable speedcondenser fan 116, expansion devices 138 and evaporator fans 132 tocontroller 150. Thus, a refrigeration appliance system according to theinvention is illustrated in FIG. 4 as a distributed refrigeration systemhaving a variable capacity vapor compression condensing unit and anevaporator network. Depending on the refrigerating modules selected, themodules can all be above freezing, all below freezing, or a mixture ofabove freezing and below freezing refrigerating modules in addition torefrigerator freezer module 160.

Refrigerating module 160 can be a two temperature refrigerator freezermodule that can be arranged to have an above freezing refrigeratorcompartment 168 and a below freezing freezer compartment 166 as notedabove. An insulated compartment separator 164 can be provided to divideinsulated cabinet 162 into a refrigerator compartment 168 and a freezercompartment 166. Freezer compartment 166 can have an evaporatorcompartment that can be formed by an evaporator compartment wall 170that can be arranged to separate the refrigerating module evaporator 130from the freezer compartment 166. Evaporator compartment wall 170 isillustrated schematically as a dashed line below refrigerating moduleevaporator 130 to indicate that air flows (air flow arrows 148) intofreezer compartment 166 from the refrigerating module evaporator 130,and similarly, air returns to the evaporator compartment under theinfluence of refrigerating module evaporator fan 132. Insulatedcompartment separator 164 can have chilled air passages 176 positionedon compartment separator 164 that can allow chilled air (air flow arrows158) from the freezer compartment 166 or evaporator compartment to flowinto refrigerator compartment 168 as is well known in the art.Compartment separator 164 can have a refrigerator compartment damper 178to control the flow of air from the refrigerator compartment 168 back tofreezer compartment 166 and refrigerating module evaporator 130 drawn byrefrigerating module evaporator fan 132. In the embodiment of theinvention illustrated in FIG. 4, refrigerator compartment damper 178 isshown in the return air path from refrigerator compartment 168. Thoseskilled in the art will understand that chilled air passages 176 couldbe arranged in the return air path from refrigerator compartment 168 andrefrigerant compartment damper 178 arranged in the flow of chilled airinto refrigerator compartment 168 if desired. Refrigerator compartmentdamper 178 can be an automatic damper operated by controller 150 asillustrated in FIG. 4, or, if desired, refrigerator compartment damper178 can be a manually adjustable damper manually adjusted by the userand temperature sensor 134 and temperature selector 136 eliminated fromfreezer compartment 166.

Similar to the embodiment of FIG. 3, according to the invention, centralcooling unit 110 can be continuously operating so that refrigerant iscontinuously circulated in refrigerant lines that can be insulatedsupply conduits 142 and return conduits 144 forming a cooling mediumcircuit from condenser 114 through manifold 117 to refrigerating modules120, 124 and 160 and back to compressor 112 through accumulator 118.Controller 150 can be arranged to adjust the capacity of the centralcooling unit 110 in response to the aggregate cooling load of theplurality of refrigerating modules 120, 124 and 160. As noted above,while three refrigerating modules 120, 124 and 160 are illustrated inFIG. 4, according to the invention one or more than three refrigeratingmodules can be connected in the refrigerating appliance system. Theaggregate cooling load can be determined by the first portion 152 ofcontroller 150 as a function of temperatures sensed by temperaturesensors 134, operating temperatures selected with temperature selectors136, and feedback from expansion devices 138. Controller 150 can also bearranged to control the operating temperature in each of therefrigerating modules 120, 124 and 160. Second portion 154 of controller150 can be arranged to control expansion devices 138 and refrigeratingmodule evaporator fans 132 to maintain the selected operatingtemperatures based on the settings of temperature selectors 136 andtemperature sensors 134. In addition, second portion 154 of controller150 can be arranged to control refrigerator compartment damper 178 tocontrol the amount of chilled air flowing from freezer compartment 166and refrigerating module evaporator 132 through compartment separator164 into refrigerator compartment 168 in conjunction with refrigeratingmodule evaporator fan 132 to maintain the user selected temperature inrefrigerator compartment 168 as well as in freezer compartment 166.Controller 150 can be arranged to maintain approximately the sameevaporator pressure in the refrigerating module evaporators 130 andcontrol the temperature in the respective refrigerating modules 120, 124and 160 by varying the flow of refrigerant into the refrigerating moduleevaporators 130 and controlling the speed of the respectiverefrigerating module evaporator fans 132. Thus, according to theinvention, a single, continuously operating variable capacity centralcooling unit 110 can be provided for a plurality of refrigeratingmodules 120, 124 and 160 that can be set to operate at differentoperating temperatures, and refrigerating module 160 can be set to havea refrigerator compartment and a freezer compartment. The variablecapacity central cooling unit 110 can be arranged for chilling a coolingmedium, a refrigerant. A cooling medium circuit that can includerefrigerant lines that can be insulated supply conduits and insulatedreturn conduits 142, 144, can be provided connecting the central coolingunit 110 to supply the cooling medium from the central cooling unit 110to the plurality of refrigerating modules 120, 124 and 160. A pluralityof cooling medium flow control devices, expansion devices 138, can beprovided for controlling flow of cooling medium, refrigerant, to each ofthe refrigerating modules 120, 124 and 160. A controller 150 and controlcircuit 156 can be provided to adjust the capacity of the variablecapacity central cooling unit 110 in order to supply sufficient coolingmedium to cool the plurality of refrigerating modules 120, 124 and 160to the respective selected operating temperatures, and the controller150 and control circuit 156 can be arranged adjust the volume of coolingmedium, refrigerant, directed to respective ones of the refrigeratingmodules 120, 124 and 160 by controlling the cooling medium flow controldevices, expansion devices 138 and refrigerating module evaporator fans132, to maintain the selected operating temperature in the respectiverefrigerating modules 120, 124 and 160. Controller 150 can control thespeed of variable speed compressor 112, variable speed condenser fan 116and expansion devices 138 to control the condensing and evaporatingpressures of the cooling medium, refrigerant, in the cooling mediumcircuit including refrigerant lines that can be insulated supply andreturn conduits 142, 144, to further control the operating temperaturein the respective refrigerating modules 120, 124 and 160.

Turning to FIG. 5, a freezer module 180 is illustrated that can be usedin combination with a refrigeration appliance system according to theinvention. Freezer module 180 can be a conventional freezer capable ofoperating without connection to the refrigeration appliance systemaccording to the invention. Particularly when a freezer module arrangedfor 0° F. storage temperatures is desired for use in combination withthe embodiments illustrated in FIG. 1 (employing liquid coolant as thecooling medium), FIG. 2 (employing chilled air as the cooling medium),or FIG. 3 (particularly when above freezing refrigerator modules will beconnected in the refrigeration appliance system) it can be advantageousto incorporate a freezer module 180 as illustrated in FIG. 5. However, afreezer module 180 can be combined with any of the embodiments accordingto the invention. Freezer module 180 can have a insulated freezercabinet 182 defining an opening 184 for access to the freezercompartment and can have an insulated freezer door 185 hinged to theinsulated freezer cabinet 182 to selectively open and close the freezercompartment. Freezer door 185 can have a handle, not shown, tofacilitate opening and closing freezer door 185 for access to freezermodule 180. Freezer module 180 can include a freezer cooling unit 189 ina machinery compartment 186 outside the refrigerated portion of thefreezer cabinet 182 that can include a freezer compressor 190, a freezercondenser 192 and a freezer condenser fan 194. Freezer module 180 caninclude a freezer evaporator 196 that can be positioned in insulatedfreezer cabinet 182 and can have a freezer evaporator fan 198 and afreezer expansion device 204. Freezer module 180 can have a freezertemperature sensor 200 that can be similar to the temperature sensorsdescribed above. Freezer module 180 can also have a freezer temperatureselector 202 to allow user to select the operating temperature for thefreezer module. Freezer module 180 can have a controller 208 and acontrol circuit 206 connecting the freezer temperature sensor 200,freezer temperature selector 202, freezer compressor 190, freezercondenser fan 194 and freezer evaporator fan 198 to controller 208.Controller 208 can operate freezer module 180 in a manner similar toconventional freezer products as is well known in the art. Those skilledin the art will understand that freezer compressor 190, freezercondenser fan 194 and freezer evaporator fan 198 can be provided withvariable speed motors as desired for optimum operation. Freezerexpansion device 204 can be an expansion device with feedback as used inthe embodiments of FIGS. 1-4 or can be a capillary tube expansiondevice, again as well known in the art. Freezer compressor 190 can be avariable speed compressor if desired as is well known in the art.Alternately, those skilled in the art will understand that freezercondenser 192 and/or freezer evaporator 196 can be static heatexchangers and that if a static heat exchanger is used the respectivefreezer condenser fan 194 and/or freezer evaporator fan 198 could beeliminated. For example freezer module 180 could be a chest freezerhaving freezer evaporator 196 positioned in contact with the inner liner210 defining the freezer compartment in the insulation between the innerliner 210 and cabinet 182 as is well known in the art. Similarly,freezer condenser 192 could be positioned in contact with cabinet 182positioned in the insulation between inner liner 210 and cabinet 182 asis well known in the art.

Turning to schematic FIG. 6, in another embodiment of the invention, aplurality of satellite stations 212, 212′ and 212″ can be connected in arefrigeration appliance system that can include a central cooling unit.Each satellite station can have one or two refrigeration appliancemodules 214 located in proximity of the satellite station to form adistributed refrigeration appliance system. Refrigeration appliancemodules can be free standing or built in modules and can be generalpurpose refrigerator, freezer or special purpose modules. Satellitestations 212 and refrigeration appliance modules 214 can be located in aresidential kitchen or other locations associated with a dwelling asdesired. The central cooling unit can be similar to the central coolingunit illustrated in FIG. 3, and accordingly, will use the same referencenumerals as the central cooling unit 110 illustrated in FIG. 3. Centralcooling unit 110, controller 150 and the central cooling systemoperation are described in detail above in connection with theembodiment of FIG. 3. As noted above, central cooling unit 110 can belocated in a location remote from a residential kitchen if desired.

According to the invention one satellite station or more than threesatellite stations can be provided in the refrigeration appliance systemas desired. Refrigeration appliance modules 214 can be located inproximity of satellite station 212 and can be connected to satellitestation 212 by an insulated supply duct 216 and an insulated return duct218 for supplying chilled air to the refrigeration appliance modules 214from satellite station 212. While insulated supply duct 216 andinsulated return duct 218 are schematically illustrated as separateducts, those skilled in the art will understand that the insulated ductscan be coaxial or, alternately, formed insulated ducts with two discreteparallel passages if desired. Those skilled in the art will understandthat if only one refrigeration appliance module 214 will be located inproximity of a satellite station 212 that only one set of insulatedsupply and return ducts can be provided, or alternately, the unused setof ducts can be plugged or blocked to provide for future expansion ofthe system. Satellite station 212 can include a satellite stationevaporator 219 that can be connected to central cooling system 110through a refrigerant line that can be an insulated supply conduit 142through expansion device 138 and a refrigerant line that can be aninsulated return conduit 144. As is well known in the art, quick connectfittings 145 can be used to connect satellite station 212 to therefrigerant lines. Expansion device 138 can be an adjustable expansiondevice with feedback based on the load experienced by the satellitestation 212, and can be connected to controller 150 through controlcircuit 156. Those skilled in the art will understand that, if desired,one or more satellite stations 212 can include a plurality of expansiondevices, not shown, connected in a refrigeration circuit for thesatellite station 212 to operate the satellite station evaporator at aplurality of operating temperatures to, for example, allow a user toselectively operate one or more of the refrigeration appliance modules214 connected to a satellite station 212 to be operated as an abovefreezing refrigerator compartment or as a below freezing freezercompartment by merely selecting a different expansion device to controlthe satellite station evaporator 219. For example, plural expansiondevices could be connected in parallel in the refrigeration circuitincluding the satellite station evaporator 219. A multi-temperatureevaporator system is disclosed in U.S. Pat. No. 5,377,498, assigned tothe assignee of this application. U.S. Pat. No. 5,377,498 isincorporated herein by reference. Satellite station 212 can also have avariable speed satellite station evaporator fan 220 that can beconnected to controller 150 through control circuit 156. Those skilledin the art will understand that satellite station evaporator fan 220 canbe a single speed fan if desired. Satellite station 212 can also have atemperature sensor 134 arranged to sense the temperature in satellitestation 212. Satellite stations 212′ and 212″ can be similar tosatellite station 212. While satellite stations 212′ and 212″ areillustrated without refrigeration appliance modules 214 positioned inproximity to the respective satellite stations to simplify the drawings,those skilled in the art will understand that refrigeration appliancemodules such as modules 214 illustrated in proximity of satellitestation 212 can, and in practice additional satellite stations 212′ and212″, if included in the distributed refrigeration appliance system,would likely be combined with one or more refrigeration appliancemodules 214.

Refrigeration appliance module 214 can have an insulated cabinet 223 andat least one insulated door 224 that can be hinged to insulated cabinet223 to selectively open and close an opening 225 in insulated cabinet223. Those skilled in the art will understand that insulated doors 224can be provided with a suitable handle, not shown, to facilitate openingand closing insulated doors 224. Refrigeration appliance module 214 canhave an adjustable baffle 222 that can be positioned to control air flowthrough insulated supply duct 216. Adjustable baffle 222 can be variablymovable between open and closed positions to permit, block and vary theflow of chilled air into refrigeration appliance module 214. Adjustablebaffle 222 can be manually adjustable by a user to control thetemperature in refrigeration appliance module 214, or, as illustrated,can be an automatic adjustable baffle connected to controller 150through control circuit 156. Air flow arrows 227 schematicallyillustrate chilled air flow from satellite station 212 to refrigerationappliance module 214 through insulated supply duct 216 and back tosatellite station 212 through insulated return duct 218. Those skilledin the art will understand that adjustable baffle 222 can be positionedin insulated return duct 218, or if desired an adjustable baffle 222 canbe provided in both supply and return ducts in order to isolate arefrigeration appliance module 214. Refrigeration appliance module 214can also have a temperature sensor 134 to sense the temperature withininsulated cabinet 223. As above, temperature sensors 134 can be athermister or other well known electronic or mechanical temperaturesensing mechanism or device and can be connected to controller 150through control circuit 156. A temperature selector 136 can be providedfor each of the refrigeration appliance modules 214 to allow the user toselect the operating temperature for each of the refrigeration appliancemodules 214. While temperature selectors 136 are illustratedschematically spaced from refrigeration appliance modules 214 atemperature selector 136 can be located in each of the refrigerationappliance modules 214 as is well known in the art, or can be centrallylocated in a combined user interface as illustrated if desired.Temperature selectors 136 can comprise a well known mechanical orelectronic selector mechanism to allow a user to select an operatingtemperature for the respective refrigerating appliance module 214 andcan be connected to controller 150 through control circuit 156. Asabove, the aggregate distributed refrigeration appliance system coolingload can be determined by the first portion 152 of controller 150 as afunction of temperatures sensed by temperature sensors 134, operatingtemperatures selected with temperature selectors 136 and feedback basedon load from expansion devices 138. Controller 150 can also be arrangedto control the operating temperature in each of the refrigerationappliance modules 214. Second portion 154 of controller 150 can bearranged to control expansion devices 138, adjustable baffles 222 andsatellite station evaporator fans 220 to maintain the selected operatingtemperatures based on the settings of temperature selectors 136 andtemperature sensors 134. Controller 150 can be arranged to maintainapproximately the same evaporator pressure in the satellite stationevaporators 219 and control the temperature in the respectiverefrigeration appliance modules 214 by varying the flow of refrigerantinto the satellite station evaporators 219, the position of automaticbaffles 222 and controlling the speed of the respective refrigerationappliance module evaporator fans 220. Refrigeration appliance modules214 connected to a satellite station 212 can be operated at differentoperating temperatures. For instance, one refrigeration appliance module214 can be set to operate as an above freezing refrigerator module andanother refrigeration appliance module 214 connected to the samesatellite station 212 can be set to operate as a below freezing freezermodule if so desired. If manual baffles are provided instead ofautomatic baffles those skilled in the art will understand that the usercan set the baffles to obtain the desired temperature in therefrigeration appliance modules. Thus, according to the invention, asingle, continuously operating variable capacity central cooling unit110 can be provided for a plurality of refrigeration appliance modules214 that can be set to operate at different operating temperatures thatcan include temperatures to allow operation of a refrigeration appliancemodule as an above freezing refrigerator compartment, a below freezingfreezer compartment or another refrigeration appliance such as an icemaker.

Turning to schematic FIGS. 7A, 7B and 7C, in another embodiment of theinvention, two compartment refrigeration appliance modules can becombined with a satellite station. A single satellite station 212 can beconnected to refrigeration appliance modules is shown in each of FIGS.7A and 7B with the central cooling unit 110 omitted to simplify thedrawings. A refrigeration appliance module 228 can be used in adistributed refrigeration appliance system having one or morerefrigeration appliance modules 214 located in proximity of one or moresatellite stations 212 to form a distributed refrigeration appliancesystem. Refrigeration appliance module 228 can be a free standing or abuilt in module and can be general purpose refrigerator, freezer or aspecial purpose module. Refrigeration appliance module 228 can belocated in a residential kitchen or other locations associated with adwelling as desired. The central cooling unit, not shown, can be similarto the central cooling unit illustrated in FIG. 3, and as above, can belocated remote from the residential kitchen. Central cooling unit 110,controller 150 and the central cooling system operation are described indetail above in connection with the embodiment of FIG. 3 and FIG. 6.Those skilled in the art will understand that more than one satellitestation 212 can be provided and that satellite station 212 can beconnected to central cooling unit 110 through well known quick connectfittings 145 to refrigerant lines that can be insulated supply conduits142 and 144, and to controller 150 through control circuit 156 asillustrated in FIG. 6. In the embodiment illustrated in FIG. 7A a twocompartment refrigeration appliance module 228 can be connected tosatellite station 212 by an insulated supply duct 232 and an insulatedreturn duct 234. A refrigeration appliance module 214 can also beconnected to satellite station 212 as in the embodiment illustrated inFIG. 6. Refrigeration appliance module 214 is described in detail aboveand accordingly will not be described in detail again in connection withFIGS. 7A-7C. Refrigerating module 214 will use the same referencenumerals as refrigerating module 214 in FIG. 6. Refrigeration appliancemodule 228 can have an insulated cabinet 229 that can have two insulateddoors 230 hinged to insulated cabinet 229 to selectively open and closeopenings 233. Insulated doors 230 can be provided with a handle, notshown, to facilitate opening and closing insulated doors 230. Insulatedcabinet 229 can have an insulated compartment separator 231 to divideinsulated cabinet 229 into two compartments 237 and 238 that can beclosed by the insulated doors 230. Insulated supply duct 232 can bearranged to extend substantially through compartment 238 to supplychilled air to compartment 237. Insulated supply duct 232 can have anopening 232′ in compartment 238 to supply chilled air to compartment238. Opening 232′ can be located adjacent compartment separator 231 andcan be provided with an adjustable baffle 235 that can be arranged tocontrol chilled air flow into compartments 237 and 238. Similarly,insulated return duct 234 can extend substantially through compartment238 to provide for chilled air return from compartment 237 withoutflowing through compartment 238. Insulated return duct 234 can have anopening 234′ that can be located adjacent compartment separator 231 andcan be provided with an adjustable baffle 235 that can be arranged tocontrol chilled air flow out of compartments 237 and 238. Similar torefrigerated appliance module 214, insulated supply duct 232 can beprovided with an adjustable baffle 222 to control the quantity ofchilled air supplied to refrigeration appliance module 228 fromsatellite station 212 by satellite station evaporator fan 220.Adjustable baffles 222 and 235 can be manually adjustable by the user toselect the operating temperatures of compartments 237 and 238, or can beautomatically adjustable baffles controlled by controller 150 throughcontrol circuit 156 as generally described above. Refrigerating module214 can operate in the same manner as refrigeration appliance modules214 as described in connection with FIG. 6. Thus, a user can operaterefrigeration appliance module 214 at one operating temperature and canoperate the two compartments 237, 238 of refrigeration appliance module228 at different temperatures and a different temperatures fromrefrigeration appliance module 214 as desired. As described above,compartment 237 and 238 can be operated at different operatingtemperatures that can above or below freezing as desired as can therefrigeration appliance module 214. Those skilled in the art willunderstand that alternate insulated duct and damper arrangements can beprovided to provide chilled air flow into compartments 237 and 238 asdesired.

In the embodiment illustrated in FIGS. 7B and 7C a two compartmentrefrigeration appliance module 228 can be connected to satellite station212 by an insulated supply duct 216 and an insulated return duct 218. Arefrigeration appliance module 214 can be connected to satellite station212 as in the embodiment illustrated in FIG. 6. Refrigeration appliancemodule 228 can have an insulated cabinet 229 that can have two insulateddoors 230 hinged to insulated cabinet 229 to selectively open and closeopenings 233. Insulated doors 230 can be provided with a handle, notshown, to facilitate opening and closing insulated doors 230. Insulatedcabinet 229 can have an insulated compartment separator 231′ to divideinsulated cabinet 229 into two compartments 237 and 238 that can beclosed by the insulated doors 230. Insulated compartment separator 231′can have a circulation fan 236 provided in an opening in compartmentseparator 231′ and can have a second opening 239. Circulation fan 236can be seen in FIG. 7C. In the embodiment of FIGS. 7B and 7C circulationfan 236 can control flow of chilled air from compartment 238 tocompartment 237. As described above, adjustable baffle 222 can controlthe flow of chilled air from satellite station 212 to refrigerationappliance module 228. Thus, for two compartment refrigeration appliancemodules two embodiments have been illustrated for controlling thetemperature in the two compartments 237, 238. One approach, as shown inFIG. 7A, employs adjustable baffles to control the flow of chilled airto the respective compartments. Another approach, as shown in FIGS. 7Band 7C, employs a circulation fan 236 in compartment separator 231′ tocontrol flow of chilled air from compartment 238 into compartment 237.Those skilled in the art will recognize that in the FIGS. 7B and 7Cembodiment compartment 237 can only operate at a higher temperature thancompartment 238, whereas in the FIG. 7A embodiment it can be possible tooperate compartment 237 at a lower temperature than compartment 238.

Turning to schematic FIG. 8A, in another embodiment of the invention, asatellite station can be combined with a refrigeration appliance module.In FIG. 8A a combined satellite station/refrigeration appliance module240 and refrigeration appliance module 214 are illustrated without acentral cooling unit 110 or additional satellite stations 212 andrefrigeration appliance modules 214 to simplify the drawings. A combinedsatellite station/refrigeration appliance module 240 can be used in adistributed refrigeration appliance system having one or morerefrigeration appliance modules 214 or 228 located in proximity of oneor more satellite stations 212 to form a distributed refrigerationappliance system. Combined satellite station/refrigeration appliancemodule 240 and refrigeration appliance module 214 can be free standingor built in modules and can be general purpose refrigerator, freezer orspecial purpose modules. Combined satellite station/refrigerationappliance module 240 can be located in a residential kitchen or otherlocations associated with a dwelling as desired. Combined satellitestation/refrigeration appliance module can have an insulated cabinet241, an insulated door 242 that can be hinged to insulated cabinet 241for selective access to the interior of the insulated cabinet throughopening 243. Insulated door 242 can have a handle, not shown, tofacilitate access to the combined satellite station/refrigerationappliance module 240. The central cooling unit, not shown, can besimilar to the central cooling unit illustrated in FIG. 3. Centralcooling unit 110, controller 150 and the central cooling systemoperation are described in detail above in connection with theembodiment of FIG. 3. Those skilled in the art will understand that morethan one satellite station 212 can be provided and that one or morecombined satellite station/refrigeration appliance modules 240 can beconnected to central cooling unit 110 through quick connect fittings 145to refrigerant lines that can be insulated supply conduits 142 and 144,and to controller 150 through control circuit 156 as illustrated in FIG.6.

Combined satellite station/refrigeration appliance module 240 can have asatellite station evaporator 246, a variable speed evaporator fan 248and an expansion device 138. Satellite station evaporator 246 andexpansion device 138 can be connected to refrigerant lines that can beinsulated supply conduit 142 and insulated return conduit 144 throughquick connect fittings 145. Satellite evaporator 246 can be positionedin an evaporator compartment schematically indicated by dashed line 250.Refrigeration appliance module 214 can be located in proximity tocombined satellite station/refrigeration appliance module 240 and can beconnected to combined satellite station/refrigeration appliance module240 by an insulated supply duct 216 and an insulated return duct 218.Refrigeration appliance module 214 is described above in detail andaccordingly will not be described again in detail in connection withFIG. 8A. Refrigeration appliance module 214 can operate in the samemanner as refrigeration appliance modules 214 as described in connectionwith FIG. 6.

Turning to schematic FIG. 8B, in another embodiment of the invention, acombined satellite station/refrigeration appliance module 252 can becombined with a refrigeration appliance module 244 similar to thecombination described above with respect to FIG. 8A. Similar to theembodiment of FIG. 8A, a combined satellite station/refrigerationappliance module 252 can be used in a distributed refrigeration systemhaving a central cooling unit 110, controller 150 and control circuit156 as illustrated in FIG. 3 having plural satellite stations 212 andrefrigeration appliance modules 214, 228. The central cooling unit 110,additional satellite stations 212 and refrigeration appliance moduleshave not been included in FIG. 8B to simplify the drawings. Combinedsatellite station/refrigeration appliance module 252 and refrigerationappliance module 244 can be free standing or built in modules and can begeneral purpose refrigerator, freezer or special purpose modules.Combined satellite station/refrigeration appliance module 252 can belocated in a residential kitchen or other locations associated with adwelling as desired. Combined satellite station/refrigeration appliancemodule 252 can have an insulated cabinet 253, an insulated door 254 thatcan be hinged to insulated cabinet 253 for selective access to theinterior of the insulated cabinet through opening 255. Insulated door254 can have a handle, not shown, to facilitate access to the combinedsatellite station/refrigeration appliance module 252. The centralcooling unit, not shown, can be similar to the central cooling unitillustrated in FIG. 3. Operation of central cooling unit 110 andcontroller 150 are described in detail above in connection with theembodiment of FIG. 3. Those skilled in the art will understand that morethan one satellite station 212 can be provided and that one or morecombined satellite station/refrigeration appliance modules 252 can beconnected to central cooling unit 110 through quick connect fittings 145to refrigerant lines that can be insulated supply conduits 142 and 144,and to controller 150 through control circuit 156 as illustrated in FIG.6.

Combined satellite station/refrigeration appliance module 252 can have adirect cooling satellite station evaporator 256 and an expansion device138. Satellite station evaporator 256 and expansion device 138 can beconnected through quick connect fittings 145 to refrigerant lines thatcan be insulated supply conduit 142 and insulated return conduit 144 andto controller 150 through control circuit 156. Satellite evaporator 256can be positioned in an evaporator compartment if desired. Refrigerationappliance module 244 can be located in proximity to combined satellitestation/refrigeration appliance module 252 and can be connected tocombined satellite station/refrigeration appliance module 252 by aninsulated supply duct 216 and an insulated return duct 218.Refrigeration appliance module 244 can have an insulated cabinet 262that can have an insulated door 263 hinged to insulated cabinet 262 toselectively provide access to insulated cabinet 262 through opening 264.Refrigeration appliance module 244 can have a circulation fan 260 thatcan circulate and control the volume of chilled air flowing intorefrigeration appliance module 244 from combined satellitestation/refrigeration appliance module 252. Combined satellitestation/refrigeration appliance module 252 and refrigeration appliancemodule 244 can have a temperature sensor 134 as described above, and canhave a temperature selector 136, not shown, that can be combined withthe respective cabinets or can be part of a central user interface asdescribed above and can be connected to controller 150 to control thetemperatures in the refrigerated compartments. Refrigeration appliancemodule 244 can otherwise operate in the same manner as refrigerationappliance modules 214 as described in connection with FIG. 6.

Turning to schematic FIG. 9, another embodiment of the invention, asatellite station can be combined with a two compartment refrigerationappliance module. In FIG. 9 a two compartment combined satellitestation/refrigeration appliance module 266 and a refrigeration appliancemodule 214 are illustrated without a central cooling unit 110 orcontroller 150 and control circuit 156 to simplify the drawings. Acombined satellite station/refrigeration appliance module 266 can beused in a distributed refrigeration appliance system having one or morerefrigeration appliance modules 214, 228 or 244 located in proximity ofone or more satellite stations 212, 240 or 252 to form a distributedrefrigeration appliance system. Combined satellite station/refrigerationappliance module 266 and refrigeration appliance module 214 can be freestanding or built in modules and can be general purpose refrigerator,freezer or special purpose modules. Combined satellitestation/refrigeration appliance module 266 can be located in aresidential kitchen or other locations associated with a dwelling asdesired. Combined satellite station/refrigeration appliance module canhave an insulated cabinet 268, an insulated door 270 that can be hingedto insulated cabinet 268 for selective access to the interior of theinsulated cabinet through opening 269. Insulated door 270 can have ahandle, not shown, to facilitate access to the combined satellitestation/refrigeration appliance module 266. The central cooling unit,not shown, can be similar to the central cooling unit illustrated inFIG. 3. Operation of central cooling unit 110 and controller 150 aredescribed in detail above in connection with the embodiment of FIG. 3.Those skilled in the art will understand that more than one satellitestation 212, 240, 252 can be provided and that one or more combinedsatellite station/refrigeration appliance modules 266 can be connectedto central cooling unit 110 through quick connect fittings 145 torefrigerant lines that can be insulated supply conduits 142 and 144, andto controller 150 control circuit 156 as illustrated in FIG. 6.

Combined satellite station/refrigeration appliance module 266 can have asatellite station evaporator 272, a variable speed evaporator fan 274and an expansion device 138. Satellite station evaporator 272 andexpansion device 138 can be connected to refrigerant lines that can beinsulated supply conduit 142 and insulated return conduit 144. Satelliteevaporator 272 can be positioned in an evaporator compartmentschematically indicated by dashed line 275. Combined satellitestation/refrigeration appliance module 266 can have a compartmentseparator 276 that can be arranged to separate insulated cabinet 268into two compartments 277 and 279. Compartment 277 can include theevaporator compartment 275, and if a below freezing freezer compartmentis desired, compartment 277 can be a freezer compartment since theevaporator compartment 275 is positioned in compartment 277. Passages278 can allow air flow, indicated by air flow arrows 227, fromcompartment 277 and/or evaporator compartment 275 into compartment 279and to return to evaporator compartment 275 when evaporator fan 274 isoperated. Evaporator fan 274 can be a variable speed fan, or if desired,can be a single speed fan. An adjustable baffle 280 can be provided incombination with one of the passages 278 to control the air flow intocompartment 279. Adjustable baffle 280 can be connected to controlcircuit 156 and can be operated by controller 150 (see FIG. 3), or canbe manually adjustable by the user to control the temperature incompartment 279 in combination with expansion device 138 and satelliteevaporator fan 274.

Refrigeration appliance module 214 can be located in proximity tocombined satellite station/refrigeration appliance module 266 and can beconnected to combined satellite station/refrigeration appliance module266 by an insulated supply duct 216 and an insulated return duct 218.Refrigeration appliance module is described above in detail andaccordingly will not be described in detail again in connection withFIG. 9. Combined satellite station/refrigeration appliance module 266and refrigeration appliance module 214 can have a temperature sensor 134as described above, and can have a temperature selector 136, not shown,that can be combined with the respective cabinets or can be part of acentral user interface as described above. Refrigeration appliancemodule 214 can operate in the same manner as refrigeration appliancemodules 214 as described in connection with FIG. 6.

Turning to schematic FIG. 10, in another embodiment of the invention, asatellite station can be combined with a refrigeration appliance moduleand a central cooling unit. In FIG. 10 a combined satellitestation/refrigeration appliance module/central cooling unit 282, asatellite station 212 and three refrigeration appliance modules 214 areillustrated. A combined satellite station/refrigeration appliancemodule/central cooling station 282 can have more than one satellitestation 212 and refrigeration appliance modules 214 or 228 located inproximity of the satellite stations 212 to form a distributedrefrigeration appliance system. Combined satellite station/refrigerationappliance module/central cooling unit 282 and refrigeration appliancemodules 214 can be free standing or built in modules and can be generalpurpose refrigerator, freezer or special purpose modules. Combinedsatellite station/refrigeration appliance module/central cooling unit282 can be located in a residential kitchen or other locationsassociated with a dwelling as desired. Combined satellitestation/refrigeration appliance module/central cooling unit 282 can havean insulated cabinet 312, an insulated door 314 that can be hinged toinsulated cabinet 312 for selective access to the interior of theinsulated cabinet through opening 313. While insulated door 314 isillustrated as a single door, those skilled in the art will understandthat two doors can be provided, one for each of the compartments 308 and310. Insulated door 314 can have a handle, not shown, to facilitateaccess to the combined satellite station/refrigeration appliance module282. Insulated cabinet 312 can have a compartment separator 316 that candivide insulated cabinet 312 into two compartments 308 and 310.

Combined satellite station/refrigeration appliance module/centralcooling unit 282 can have a satellite station evaporator 320, a variablespeed evaporator fan 322 and an expansion device 138. Satellite stationevaporator 322 and expansion device 138 can be connected to manifold 292and accumulator 294 to form a refrigerant circuit. Satellite evaporator320 can be positioned in an evaporator compartment schematicallyindicated by dashed line 324. Refrigeration appliance module 214 isdescribed above in detail. Combined satellite station/refrigerationappliance module/central cooling unit 282 and refrigeration appliancemodule 214 can have a temperature sensors 134 as described above, andcan have a temperature selector 136 that can be combined with therespective cabinets or can be part of a central user interface asdescribed above. Refrigeration appliance module 214 can operate in thesame manner as refrigeration appliance modules 214 as described inconnection with FIG. 6. Compartment separator 316 can have passages 317that can provide for air flow between compartment 308 and 310. One ofthe passages 317 can have an adjustable baffle 318 that can control thequantity of chilled air flowing from compartment 308 and/or evaporatorcompartment 324 into compartment 310.

The central cooling unit 284 can be similar to the central cooling unitillustrated in FIG. 3 but can be combined with the satellite evaporatorand appliance storage module in a single cabinet or positioned adjacentthe combined satellite station and refrigeration appliance modulecabinet as desired. Central cooling unit 284 can include a variablespeed compressor 286, a condenser 288 and a variable speed condenser fan290. Central cooling unit 284 can also include a manifold 292 and anaccumulator 294. Central cooling unit 284 can be connected to satellitestation 212 through quick connect fittings 299 to refrigerant lines thatcan be an insulated supply conduit 296 and an insulated return conduit298 forming a cooling medium circuit for conveying refrigerant fromcentral cooling unit 284 through manifold 292 and insulated supplyconduit 296 to satellite station 212 and returning refrigerant fromsatellite station 212 to accumulator 294 through insulated returnconduits 298. Central cooling unit 284 can also include a microprocessorbased controller 300 that can include a first portion 302 that can bearranged to control operation of the central cooling unit 284 and asecond portion 304 than can be arranged to control the volume ofrefrigerant directed to the respective refrigerating modules similar tocontroller 50 in the embodiment of FIG. 1. A control circuit 306 can beprovided to connect the temperature sensors 134, the temperatureselectors 136, variable speed compressor 286, variable speed condenserfan 290, expansion devices 138 and evaporator fans 220 and 322. Centralcooling unit 284 can operate similar to the central cooling unitsdescribed in detail above in connection with FIG. 3 and FIG. 6. Asdescribed in detail above, controller 300 can be arranged to operatecompartments 308 and 310 and refrigeration appliance modules 214 atselected temperatures as a user might select by setting appropriatetemperature selectors 136.

Satellite station 212 and refrigeration appliance modules 214 can besimilar to the satellite station 212 and refrigeration appliance modulesillustrated and described in detail in connection with FIG. 6. Thoseskilled in the art will understand that more than one satellite station212 can be provided and that one or more combined satellitestation/refrigeration appliance modules 240 can be connected to centralcooling unit 284 through quick connect fittings 299 to refrigerant linesthat can be insulated supply conduits 142 and 144 and to controller 300through control circuit 306 similar to the distributed refrigerationsystem illustrated in FIG. 6.

Turning to schematic FIG. 11, in another embodiment of the invention, aplurality of refrigerating modules 120 and 326 can be connected in adistributed refrigeration appliance system that can include a centralcooling unit 110. Refrigerating modules 120 and 326 can be free standingor built-in modules and can be general purpose refrigerator, freezer orspecial purpose modules. Refrigerating modules 120 and 326 can belocated in a residential kitchen or other locations associated with adwelling as desired. The central cooling unit can be similar to centralcooling unit 110 illustrated in FIG. 3, and accordingly, will use thesame reference numerals as central cooling unit 110 illustrated in FIG.3. Similarly, refrigerating module 120 can be similar to refrigeratingmodule 120 illustrated in FIG. 3, and accordingly, will use the samereference numerals as refrigerating module 120 in FIG. 3. As notedabove, central cooling unit 110 can be located in a location remote froma residential kitchen, or in or in proximity of the residential kitchenas desired as those skilled in the art will understand.

According to the invention, other refrigerating modules and/or satellitestations and refrigeration appliance modules as described above can becombined with central cooling unit 110 in addition to refrigeratingmodules 120 and 326 illustrated in FIG. 11. Refrigerating module 120 isdescribed in detail above and accordingly will not be described indetail again in connection with FIG. 11. Similarly, central cooling unit110 is described in detail above and accordingly will not be describedin detail again in connection with FIG. 11. Refrigerating module 326 canhave an insulated cabinet 328 and at least one insulated door 330 thatcan be hinged to insulated cabinet 328 to selectively open and closecompartments 331 and 332 formed in insulated cabinet 328 by insulatedcompartment separator 334. Insulated door 330 can be provided with asuitable handle, not shown, to facilitate opening and closing insulateddoor 330. Those skilled in the art that two insulated doors can beprovided to independently close compartments 331 and 332 if desired.Refrigerating module 326 can include a refrigerating module evaporator336 and a refrigerating module evaporator fan 338. Refrigerating moduleevaporator fan 338 can be a single speed fan, or if desired, can be avariable speed fan. An expansion device 138 can control flow ofrefrigerant to refrigerating module 326. Expansion device 138 can be anexpansion device with feedback arranged to control refrigerant flowthough expansion device 138. Refrigerating module 326 can have atemperature sensor 134 and a temperature selector 136, as describedabove, for each compartment 331 and 332. Temperature sensors 134,temperature selectors 136 and expansion device 138 can be connected tocontroller 150 though control circuit 156 as described above in detail.Also as described above in detail temperature selectors 136 can belocated in refrigerating modules 120 and 326 or can be part of a centraluser interface as is well known and described above. Refrigeratingmodule evaporator 336 can be connected to refrigerant lines that can beinsulated supply and return conduits 142 and 144 leading to centralcooling unit 110.

Refrigerating module 326 can further employ a cascade cooling system tocool compartment 332. For example, compartment 332 can be operated as abelow freezing freezer compartment and compartment 331 can be operatedas an above freezing refrigerator compartment. In the event thatrefrigerating module 120 is also desired to operate as an above freezingrefrigerator compartment, central cooling unit 110 can be operated toprovide refrigerant cooled sufficiently to chill refrigerating moduleevaporators 130 and 336 to a temperature to produce above freezingtemperatures in refrigeration module 120 and compartment 331 ofrefrigerating module 326. Operating central cooling unit 110 to produceonly above freezing temperatures allows compressor 112 to operate athigher refrigerant evaporating pressures, lower refrigerant condensingpressures and can accordingly require less energy to operate centralcooling unit 110. Thus, when a distributed refrigeration appliancesystem will have primarily above freezing refrigerator modules it can beenergy and cost efficient to use cascade cooling to achieve the desiredbelow freezing temperatures in compartments desired to operate at belowfreezing freezer temperatures.

The cascade cooling system can be a thermoelectric cooling system 340 asillustrated in refrigerating module 326. Alternate cascade coolingsystems, described below, can be used in combination with refrigeratingmodule 326 in lieu of thermoelectric cooling system 340. Thermoelectriccooling system 340 can be connected to controller 150 through controlcircuit 156. Thermoelectric cooling system 340 can be a well knownthermoelectric device that can include a thermoelectric module 342combined with heatsink enclosures 344 and 346 on opposite surfaces ofthe thermoelectric module 342. One heatsink enclosure 346 can bepositioned in heat exchange communication with compartment 331 and theother heatsink enclosure 344 can be positioned in heat exchangecommunication with compartment 332. Thermoelectric cooler 340 can alsohave a circulating fan 348 for circulating air in compartment 332 overheatsink enclosure 344. While a circulating fan 348 is illustrated incompartment 332 those skilled in the art will understand that acirculating fan can be used in connection with both or neither of theheatsink enclosures 344 and 346 if desired. When a voltage is applied tothermoelectric module 342 one surface becomes cold absorbing heat fromthe heatsink enclosure in contact with the cold surface and the oppositesurface becomes hot releasing heat to the heatsink enclosure in contactwith the hot surface. Thus, when the proper polarity voltage is appliedto thermoelectric module 342, heatsink enclosure 344 can become cold andcirculating fan 348 can circulate air chilled by heatsink enclosure 344through compartment 332. Meanwhile, heat released by heatsink enclosure346 heats compartment 331 which heat can be absorbed by refrigeratingmodule evaporator 336 and transferred to central cooling system 110. Aproperly sized thermoelectric cooler can easily reduce the temperaturein compartment 332 by 20° C. relative to compartment 331, and cantherefore cool compartment 332 to below freezing freezer temperaturescompared to above freezing refrigerator temperatures in compartment 331.Thus, compartment 332 can be cooled based on the temperature selectedfor compartment 332 by the temperature selector 136 for compartment 332.If desired, thermoelectric module 342 can be energized with oppositepolarity voltage to cause thermoelectric module to provide heat tocompartment 332 withdrawing heat from compartment 331. Thus, operatingthermoelectric module 342 can allow a user to use compartment 332 towarm the contents of compartment 332 such as to defrost frozen articlesif desired. Controller 150 can be arranged to operate thermoelectricmodule 342 to heat compartment 332 when the temperature selector 136 forcompartment 332 is set to a warming and/or defrosting setting. Whenthermoelectric module 342 is set to heat compartment 332 heat withdrawnfrom compartment 331 will cool compartment 331 and reduce the coolingload of compartment 331.

Turning to schematic FIG. 12, in another embodiment of the invention, aplurality of refrigerating modules 20 and 350 can be connected in adistributed refrigeration appliance system that can include a centralcooling unit 10. Refrigerating modules 20 and 350 can be free standingor built-in modules and can be general purpose refrigerator, freezer orspecial purpose modules. Refrigerating modules 20 and 350 can be locatedin a residential kitchen or other locations associated with a dwellingas desired. The central cooling unit can be similar to central coolingunit 10 illustrated in FIG. 1, and accordingly, will use the samereference numerals as central cooling unit 10 illustrated in FIG. 1.Similarly, refrigerating module 20 can be similar to refrigeratingmodule 20 illustrated in FIG. 1, and accordingly, will use the samereference numerals as refrigerating module 20 in FIG. 1. As noted above,central cooling unit 10 can be located in a location remote from aresidential kitchen, or in or in proximity of the residential kitchen asdesired as those skilled in the art will understand.

According to the invention, other refrigerating modules and/or satellitestations and refrigeration appliance modules as described above can becombined with central cooling unit 10 in addition to refrigeratingmodules 20 and 350 illustrated in FIG. 12. Refrigerating module 20 isdescribed in detail above and accordingly will not be described indetail again in connection with FIG. 12. Similarly, central cooling unit10 is described in detail above and accordingly will not be described indetail again in connection with FIG. 12. Refrigerating module 350 caninclude a cascade cooling system. Refrigerating module 350 can have aninsulated cabinet 352 and insulated doors 353 and 354 that can be hingedto insulated cabinet 352 to selectively open and close compartments 356and 357 formed in insulated cabinet 352 by insulated compartmentseparator 355. Insulated doors 353 and 354 can be provided with asuitable handle, not shown, to facilitate opening and closing insulateddoors 353 and 354. Those skilled in the art that a single insulated doorcan be provided to close compartments 356 and 357 if desired.Refrigerating module 350 can include a heat exchanger 30 and a heatexchanger fan 32 similar to refrigerating module 20. Heat exchanger fan32 can be a single speed fan, or if desired, can be a variable speedfan. A valve 46 can control flow of liquid coolant to refrigeratingmodule 350. Valve 46 can be an on-off valve arranged to control flow ofliquid coolant into though valve 46. Refrigerating module 350 can havetemperature sensors 34 and temperature selectors 36 as described abovefor each compartment 356 and 357. Temperature sensors 34, temperatureselectors 36 and valves 46 can be connected to controller 50 thoughcontrol circuit 56 as described above in detail. Also as described abovein detail temperature selectors 36 can be located in refrigeratingmodules 20 or 350 or can be part of a central user interface as is wellknown and described above. Refrigerating module heat exchanger 30 can beconnected to insulated conduits 42 leading to central cooling unit 10for supplying chilled liquid coolant to heat exchanger 30.

Refrigerating module 350 can further employ a cascade cooling system tocool compartment 357. For example, compartment 357 can be operated as abelow freezing freezer compartment and compartment 356 can be operatedas an above freezing refrigerator compartment. As described above,central cooling unit 10 can include a secondary loop evaporator 40arranged to supply chilled liquid coolant to refrigerating modules.While a secondary loop refrigerating system can produce below freezingstorage temperatures, such refrigerating systems operate moreefficiently when arranged to provide above freezing storagetemperatures. Accordingly, when a distributed refrigeration appliancesystem includes a secondary loop utilizing chilled liquid coolant it canbe energy and cost efficient to use cascade cooling to achieve thedesired below freezing temperatures in below freezing freezercompartments.

The cascade cooling system for refrigerating module 350 can be athermoelectric cooling system 340 similar to the thermoelectric coolingsystem 340 illustrated in refrigerating module 326 in the embodiment ofFIG. 11. Alternate cascade cooling systems described below can be usedin combination with refrigerating module 350 in lieu of thermoelectriccooling system 340. Accordingly, thermoelectric cooling system 340illustrated in FIG. 12 will employ the same reference numerals as inFIG. 11 and the operation of thermoelectric cooling system will notagain be explained in detail in connection with FIG. 12. Chilled liquidcoolant circulating through heat exchanger 30 in compartment 356 cancarry heat released by heatsink enclosure 346 to central cooling unit10. Thus, compartment 357 can be cooled independently of the temperaturein compartment 356 based on the temperature selected for compartment 357by the temperature selector 36 for compartment 356. Further, asdescribed above, thermoelectric cooling system 340 can provide lowerstorage temperatures in compartment 357 than can be effectively achievedin compartment 356 relying on cooling provided by chilled liquidcoolant.

Turning to schematic FIG. 13, in another embodiment of the invention, aplurality of refrigerating modules 72 and 360 can be connected in adistributed refrigeration appliance system that can include a centralcooling unit 60. Refrigerating modules 72 and 360 can be free standingor built-in modules and can be general purpose refrigerator, freezer orspecial purpose modules. Refrigerating modules 72 and 360 can be locatedin a residential kitchen or other locations associated with a dwellingas desired. The central cooling unit can be similar to central coolingunit 60 illustrated in FIG. 2, and accordingly, will use the samereference numerals as central cooling unit 60 illustrated in FIG. 2.Similarly, refrigerating module 72 can be similar to refrigeratingmodule 72 illustrated in FIG. 2, and accordingly, will use the samereference numerals as refrigerating module 72 in FIG. 2. As noted above,central cooling unit 60 can be located in a location remote from aresidential kitchen, or in or in proximity of the residential kitchen asdesired as those skilled in the art will understand.

According to the invention, other refrigerating modules and/or satellitestations and refrigeration appliance modules as described above can becombined with central cooling unit 60 in addition to refrigeratingmodules 72 and 360 illustrated in FIG. 13. Refrigerating module 72 isdescribed in detail above and accordingly will not be described indetail again in connection with FIG. 13. Similarly, central cooling unit60 is described in detail above and accordingly will not be described indetail again in connection with FIG. 13. Refrigerating module 360 caninclude a cascade cooling system. Refrigerating module 360 can have aninsulated cabinet 362 and insulated doors 363 and 364 that can be hingedto insulated cabinet 362 to selectively open and close compartments 366and 367 formed in insulated cabinet 362 by insulated compartmentseparator 365. Insulated doors 363 and 364 can be provided with asuitable handle, not shown, to facilitate opening and closing insulateddoors 363 and 364. Those skilled in the art that a single insulated doorcan be provided to close compartments 366 and 367 if desired.Refrigerating module 360 can include an air inlet 93 leading frominsulated ducts 92 and an air outlet 95 similarly leading to insulatedducts 92 that are in communication with evaporator 90. Air inlets 93 andair outlets 95 form the apparatus for receiving the cooling medium,chilled air, in refrigerating modules 72 and 360 as described above indetail. A baffle 96 can control flow of chilled air into compartment 366of refrigerating module 360. Baffle 96 can adjustable between open andclosed to variably control flow of chilled air into compartment 366.Refrigerating module 360 can have temperature sensors 84 and temperatureselectors 86 as described above for each compartment 366 and 367.Temperature sensors 84, temperature selectors 86 and baffle 96 can beconnected to controller 100 though control circuit 106 as describedabove in detail. Also as described above in detail temperature selectors86 can be located in refrigerating modules 72 or 360 or can be part of acentral user interface as is well known and described above.

The cascade cooling system for refrigerating module 360 can be athermoelectric cooling system 340 similar to the thermoelectric coolingsystem 340 illustrated in refrigerating module 326 in the embodiment ofFIG. 11. Accordingly, the thermoelectric cooling system 340 illustratedin FIG. 13 will employ the same reference numerals as in FIG. 11 and theoperation of thermoelectric cooling system 340 will not again beexplained in detail in connection with FIG. 13. Chilled air flowingthrough compartment 366 can carry heat released by heatsink enclosure346 to central cooling unit 60. Thus, compartment 367 can be cooledindependently of the temperature in compartment 366 based on thetemperature selected for compartment 367 by the temperature selector 86for compartment 366. Further, as described above, thermoelectric coolingsystem 340 can provide lower storage temperatures in compartment 367than can be efficiently achieved in compartment 366 relying on coolingprovided by chilled air. While refrigerating module 360 illustrated inFIG. 13 does not include air passages through compartment separator 365to allow chilled air to flow into compartment 367, those skilled in theart will understand that air passages and suitable baffles, all notshown, can be provided in compartment separator 365 to provide thepossibility of selectively cooling compartment 367 utilizing chilled airor cooling via thermoelectric cooling system 340.

Turning to schematic FIG. 14, in another embodiment of the invention, aplurality of refrigerating modules 20 and 350 can be connected in adistributed refrigeration appliance system that can include a centralcooling unit 370. Refrigerating modules 20 and 350 can be free standingor built-in modules and can be general purpose refrigerator, freezer orspecial purpose modules. Refrigerating modules 20 and 350 can be locatedin a residential kitchen or other locations associated with a dwellingas desired. Refrigerating modules 20 and 350 can be similar torefrigerating modules 20 and 350 illustrated in FIG. 12, andaccordingly, will use the same reference numerals as refrigeratingmodules 20 and 350 in FIG. 12.

The refrigeration appliance system illustrated in schematic form in FIG.14 also includes a central cooling unit 370 that can be an absorptionrefrigeration system as are well known in the art. The central coolingunit 370 illustrated in FIG. 14 can be a single effect absorption systemthat provides the same result as a vapor compression system such ascentral cooling units illustrated in FIGS. 1-3 with the compressor isreplaced with a solution circuit that absorbs vapor at a low pressureand desorbs it at a higher pressure. Central cooling unit 370 can have asolution circuit that can include absorber 372, pump 373, solution heatexchanger 374, desorber 375 and liquid metering valve 376 connected bysuitable solution circuit conduits 377. Central cooling unit 370 canalso include an ammonia refrigerant circuit with condenser 378,precooler 379, expansion valve 380 and a chilled liquid evaporator 381connected in series to the solution circuit absorber 372 and desorber375 by suitable ammonia circuit conduits 382. Desorber 375 can have aheat source, shown as heating element 371, employed to provide heat tothe desorber 375 to evaporate and separate the ammonia refrigerant fromthe water ammonia solution as the water is drained back to the absorber372 through metering valve 376 Ammonia separated from the water ammoniasolution in desorber 375 flows into condenser 378 and through expansionvalve 380 into chilled liquid evaporator 381. While a heating element371 is shown, those skilled in the art will understand that other heatsources that can include a gas burner or a solar heater can be usedinstead of heating element 371 to supply heat to desorber 375 tovaporize the ammonia from the ammonia water solution. Likewise, whilecentral cooling unit 370 is illustrated as a single effect absorptionsystem, those skilled in the art will understand that other absorptionsystems can be used as central cooling unit if desired.

In operation, central cooling unit 370 chills liquid coolant in chilledliquid evaporator 381. As noted above, chilled liquid evaporator 381 canbe a shell and tube evaporator. Similar to central cooling unit 10illustrated in FIG. 1 and FIG. 12 variable speed pump 44 can circulatethe chilled liquid coolant to refrigerating modules 20 and 350 asdescribed above in detail. Central cooling unit 370 can also have acontroller 50, control circuit 56 and temperature selectors 36 similarto central cooling unit 10 described above in detail. Since theoperation of the refrigeration appliance system, other than the centralcooling unit 370, is similar to the operation of the refrigerationappliance system described in connection with FIG. 12, the descriptionof the operation of the system will not be repeated in connection withFIG. 14. As described in connection with FIG. 12, a cascade coolingsystem can facilitate providing compartments operating at below freezingtemperatures in a distributed refrigeration appliance system having anabsorption refrigeration system central cooling unit having a chilledliquid evaporator chilling liquid coolant in a secondary loop supplyingrefrigerating modules.

Turning to schematic FIG. 15, in another embodiment of the invention, arefrigerating module 350′ and a freestanding refrigeration appliance 384can be connected in a distributed refrigeration appliance system thatcan include a central cooling unit 10. Refrigerating module 350′ andrefrigeration appliance 384 can be a free standing or built-in and canbe general purpose refrigerator, freezer or special purpose modules.Refrigerating module 350′ and refrigeration appliance 384 can be locatedin a residential kitchen or other locations associated with a dwellingas desired. The central cooling unit can be similar to central coolingunit 10 illustrated in FIG. 1, and accordingly, will use the samereference numerals as central cooling unit 10 illustrated in FIG. 1.Similarly, refrigerating module 350′ can be similar to refrigeratingmodule 350 illustrated in FIG. 12, and accordingly, will use the samereference numerals as refrigerating module 350 in FIG. 12 except for amodified heat exchanger and cascade cooling system that will bedescribed below. As noted above, central cooling unit 10 can be locatedin a location remote from a residential kitchen, or in or in proximityof the residential kitchen as desired as those skilled in the art willunderstand.

According to the invention, other refrigerating modules and/or satellitestations and refrigeration appliance modules as described above can becombined with central cooling unit 10 in addition to refrigeratingmodule 350′ and refrigeration appliance 384 illustrated in FIG. 15.Central cooling unit 10 is described in detail above and accordinglywill not be described in detail again in connection with FIG. 15.Refrigerating appliance 384 can include a cascade cooling system.Refrigerating appliance 384 can have an insulated cabinet 386 and aninsulated door 387 can be hinged to insulated cabinet 386 to selectivelyclose and open opening 388 in insulated cabinet 386. Insulated door 387can be provided with a suitable handle, not shown, to facilitate openingand closing insulated door 387. Refrigerating appliance 384 can includean evaporator 389 and an evaporator fan 390. Evaporator fan 390 can be asingle speed fan, or if desired, can be a variable speed fan. Anexpansion device 392 can control flow of refrigerant to evaporator 389.Expansion device 392 can be an expansion device with feedback similar toexpansion devices 138 in the embodiment of FIG. 3. Refrigerationappliance 384 can have a temperature sensor 398 and a temperatureselector 399. Temperature sensor 398, temperature selector 399 andexpansion device 392 can be connected to controller 396 though controlcircuit 397. Controller 396 can be similar to controller 50 describedabove in detail, and can have a first portion and a second portionsimilar to controller 50. Refrigeration appliance 384 can have a cascadecooling unit 400 arranged to supply refrigerant to evaporator 389.Cascade cooling unit 400 can include a compressor 393 and a liquidcooled condenser 394. Liquid cooled condenser 394 can be connected tocentral cooling unit 10 through valve 46 and insulated conduits 42.Cascade cooling unit 400 can be connected to the central cooling unit 10that can provide a low temperature heat sink for cascade cooling unit400 enabling it to run at a much higher capacity than if it rejectedheat to the ambient air. Controller 396 can control operation ofrefrigeration appliance 384 as is well known in the art and can includea connection to controller 50 for the central cooling unit 10.Refrigeration appliance 384 can efficiently provide cooling temperaturesmuch colder than can be practically achieved utilizing chilled liquidcoolant supplied by central cooling unit 10 since the vapor compressioncascade cooling unit 400 can efficiently provide below 0° C.temperatures. While a vapor compression cascade cooling unit 400 isillustrated in the embodiment of FIG. 15, those skilled in the art willunderstand that a thermoelectric cooling unit or Stirling cycle coolingunit as illustrated in FIGS. 17A and 17B below can be employed asdesired.

As noted above, refrigerating module 350′ can be similar torefrigerating module 350 in the embodiment of FIG. 12 with the exceptionof the heat exchanger and linkage of thermoelectric cooling system 340to the central cooling system 10. Heat exchanger 30′ in refrigeratingmodule 350′ can include a leg 30″ that can extend to and contactheatsink enclosure 346′ to absorb heat rejected by heatsink enclosure346′ rather than having heatsink enclosure 346′ reject heat intocompartment 356 as can be the case in the embodiment of FIG. 12. Otherthan the modifications in heat exchanger 30′ and heatsink enclosure346′, refrigerating module 350′ is similar in operation to the operationof refrigerating module 350 as described above in detail in connectionwith FIG. 12 and will not be repeated in connection with FIG. 15.

Turning to schematic FIG. 16, in another embodiment of the invention, aplurality of refrigerating modules 20 and 350 can be connected in adistributed refrigeration appliance system that can include a centralcooling unit 402. Refrigerating modules 20 and 350 can be free standingor built-in modules and can be general purpose refrigerator, freezer orspecial purpose modules. Refrigerating modules 20 and 350 can be locatedin a residential kitchen or other locations associated with a dwellingas desired. Refrigerating modules 20 and 350 can be similar torefrigerating modules 20 and 350 illustrated in FIG. 12, andaccordingly, will use the same reference numerals as refrigeratingmodules 20 and 350 in FIG. 12. Central cooling unit 402 can be locatedin a location remote from a residential kitchen, or in or in proximityof the residential kitchen as desired as those skilled in the art willunderstand.

According to the invention, other refrigerating modules and/or satellitestations and refrigeration appliance modules as described above can becombined with central cooling unit 402 in addition to refrigeratingmodules 20 and 350 illustrated in FIG. 16. Refrigerating modules 20 and350 are described in detail above and accordingly will not be describedin detail again in connection with FIG. 16. Central cooling unit 402 canbe a Stirling cycle refrigerating unit that can include a Stirling cyclecooler 404 that can have a hot end 410 and a cold end 413 as is wellknown in the art. Stirling cycle cooler 404 can have a linear engine 406and can have a hot end heat exchanger 411 and fan 412 to reject heatfrom the hot end 410. Cold end 413 can be associated with a chilledliquid cooler 415 that can be arranged to transfer heat from chilledliquid in the chilled liquid circuit to the cold end 413. As in thesecondary loop systems described above, central cooling unit 402 canhave a pump 44 to circulate chilled liquid in insulated conduits 42.Stirling cycle cooler 404, fan 412 and pump 44 can be connected tocontroller 50 through control circuit 56. To provide cooling, Stirlingcycle cooler 404, fan 412 and pump 44 can be activated by controller 50causing Stirling cycle cooler 404 to cause cold end 413 to become coldabsorbing heat in chilled liquid cooler 415 from the chilled liquidcirculated by pump 44 and reject the heat at hot end 410 to heatexchanger 411, all as well known in the art. Thus, as illustrated inFIGS. 12, 13, 14 and 16, a variety of central cooling units can used incombination with one or more refrigerating modules including a cascadecooling arrangement. Central cooling units can be a vapor compressionrefrigeration system, a vapor compression refrigeration system with achilled liquid secondary loop, an absorption system or Stirling cyclecooler with a chilled liquid secondary loop and can be a vaporcompression refrigeration system, an absorption system or Stirling cyclecooler arranged to chill air for circulation to refrigerating moduleshaving a cascade cooling arrangement.

Turning to schematic FIG. 17A, in another embodiment of the invention, aplurality of refrigerating modules 20 and 420 can be connected in adistributed refrigeration appliance system that can include a centralcooling unit 10. Refrigerating modules 20 and 420 can be free standingor built-in modules and can be general purpose refrigerator, freezer orspecial purpose modules. Refrigerating modules 20 and 420 can be locatedin a residential kitchen or other locations associated with a dwellingas desired. The central cooling unit can be similar to central coolingunit 10 illustrated in FIG. 1, and accordingly, will use the samereference numerals as central cooling unit 10 illustrated in FIG. 1.Similarly, refrigerating module 20 can be similar to refrigeratingmodule 20 illustrated in FIG. 12, and accordingly, will use the samereference numerals as refrigerating module 20 in FIG. 12. As notedabove, central cooling unit 10 can be located in a location remote froma residential kitchen, or in or in proximity of the residential kitchenas desired as those skilled in the art will understand.

According to the invention, other refrigerating modules and/or satellitestations and refrigeration appliance modules as described above can becombined with central cooling unit 10 in addition to refrigeratingmodules 20 and 420 illustrated in FIG. 17A. Refrigerating module 20 isdescribed in detail above and accordingly will not be described indetail again in connection with FIG. 17A. Similarly, central coolingunit 10 is described in detail above and accordingly will not bedescribed in detail again in connection with FIG. 17A. Refrigeratingmodule 420 can include a cascade cooling system. Refrigerating module420 can have an insulated cabinet 422 and insulated doors 424 and 425that can be hinged to insulated cabinet 422 to selectively open andclose compartments 426 and 427 formed in insulated cabinet 422 byinsulated compartment separator 423. Insulated doors 424 and 425 can beprovided with a suitable handle, not shown, to facilitate opening andclosing insulated doors 424 and 425. Those skilled in the art that asingle insulated door can be provided to close compartments 426 and 427if desired. Refrigerating module 420 can include a heat exchanger 30 anda heat exchanger fan 32 similar to refrigerating module 20. Heatexchanger fan 32 can be a single speed fan, or if desired, can be avariable speed fan. A valve 46 can control flow of liquid coolant torefrigerating module 420. Valve 46 can be an on-off valve arranged tocontrol flow of liquid coolant into though valve 46. Refrigeratingmodule 420 can have temperature sensors 34 and temperature selectors 36,described above, for each compartment 426 and 427. Temperature sensors34, temperature selectors 36 and valves 46 can be connected tocontroller 50 though control circuit 56 as described above in detail.Also as described above in detail temperature selectors 36 can belocated in refrigerating modules 20 or 420 or can be part of a centraluser interface as is well known and described above. Refrigeratingmodule heat exchanger 30 can be connected to insulated conduits 42leading to central cooling unit 10 for supplying chilled liquid coolantto heat exchanger 30.

The cascade cooling system for refrigerating module 420 can be a vaporcompression cascade cooling unit 430 that can be located in the base ofinsulated cabinet 422. Cascade cooling unit 430 can include a compressor431, liquid cooled condenser 432, evaporator 433, evaporator fan 434 andexpansion device 435 connected in a refrigerant circuit as is well knownin the art. A loop 42′ can convey chilled liquid coolant exitingevaporator 30 to liquid cooled condenser 432 to provide a lowtemperature heatsink for cascade cooling system 430 allowing cascadecooling system 430 to run at a much higher capacity than a similarsystem having an ambient air cooled condenser. Thus, compartment 427 canbe cooled independently of the temperature in compartment 426 based onthe temperature selected for compartment 427 by the temperature selector36 for compartment 427. Further, as described above, vapor compressioncascade cooling system 430 can efficiently provide much lower storagetemperatures in compartment 427 than can be achieved in compartment 426relying on cooling provided by chilled liquid coolant.

Turning to schematic FIG. 17B, in another embodiment of the invention, aplurality of refrigerating modules 20 and 440 can be connected in adistributed refrigeration appliance system that can include a centralcooling unit 10. Refrigerating modules 20 and 440 can be free standingor built-in modules and can be general purpose refrigerator, freezer orspecial purpose modules. Refrigerating modules 20 and 440 can be locatedin a residential kitchen or other locations associated with a dwellingas desired. The central cooling unit can be similar to central coolingunit 10 illustrated in FIG. 1, and accordingly, will use the samereference numerals as central cooling unit 10 illustrated in FIG. 1.Similarly, refrigerating module 20 can be similar to refrigeratingmodule 20 illustrated in FIG. 12, and accordingly, will use the samereference numerals as refrigerating module 20 in FIG. 12. As notedabove, central cooling unit 10 can be located in a location remote froma residential kitchen, or in or in proximity of the residential kitchenas desired as those skilled in the art will understand.

According to the invention, other refrigerating modules and/or satellitestations and refrigeration appliance modules as described above can becombined with central cooling unit 10 in addition to refrigeratingmodules 20 and 440 illustrated in FIG. 17B. Refrigerating module 20 isdescribed in detail above and accordingly will not be described indetail again in connection with FIG. 17B. Similarly, central coolingunit 10 is described in detail above and accordingly will not bedescribed in detail again in connection with FIG. 17B. Refrigeratingmodule 440 can include a cascade cooling system. Refrigerating module440 can have an insulated cabinet 442 and insulated doors 444 and 445that can be hinged to insulated cabinet 442 to selectively open andclose compartments 446 and 447 formed in insulated cabinet 442 byinsulated compartment separator 443. Insulated doors 444 and 445 can beprovided with a suitable handle, not shown, to facilitate opening andclosing insulated doors 444 and 445. Those skilled in the art that asingle insulated door can be provided to close compartments 446 and 447if desired. Refrigerating module 440 can include a heat exchanger 30 anda heat exchanger fan 32 similar to refrigerating module 20 that can bearranged to cool compartment 446. Heat exchanger fan 32 can be a singlespeed fan, or if desired, can be a variable speed fan. A valve 46 cancontrol flow of liquid coolant to refrigerating module 440. Valve 46 canbe an on-off valve arranged to control flow of liquid coolant intothough valve 46. Refrigerating module 440 can have temperature sensors34 and temperature selectors 36 as described above for each compartment446 and 447. Temperature sensors 34, temperature selectors 36 and valves46 can be connected to controller 50 though control circuit 56 asdescribed above in detail. Also as described above in detail temperatureselectors 36 can be located in refrigerating modules 20 or 440 or can bepart of a central user interface as is well known and described above.Refrigerating module heat exchanger 30 can be connected to insulatedconduits 42 leading to central cooling unit 10 for supplying chilledliquid coolant to heat exchanger 30.

Refrigerating module 440 can have a cascade cooling unit 450 that can belocated in the base of insulated cabinet 442. Cascade cooling unit 450can be a Stirling cycle cooler 452. Stirling cycle coolers are wellknown in the art and typically include a hot end 455, a cold end 454 anda linear motor 456. Cascade cooling unit 450 can also include acirculating fan 457 arranged to circulate air in compartment 447 overcold end 454 to cool compartment 457. Circulating fan 457 and Stirlingcycle cooler 452 can be connected to controller 50 through controlcircuit 56. A loop 42″ can convey chilled liquid coolant exitingevaporator 30 to hot end 455 to remove heat from the Stirling cyclecooler allowing cascade cooling system 450 to efficiently coolcompartment 447. Thus, compartment 447 can be cooled independently ofthe temperature in compartment 446 based on the temperature selected forcompartment 447 by the temperature selector 36 for compartment 447.Further, as described above, Stirling cycle cascade cooling system 450can efficiently provide much lower storage temperatures in compartment447 than can be achieved in compartment 446 relying of cooling providedby chilled liquid coolant.

The alternate cascade cooling units described above in connection withFIGS. 17A and 17B can be used in any of the thermoelectric cascadecooling embodiments disclosed in FIGS. 11, 12, 13, 14 and 16 in lieu ofthe thermoelectric cooling unit disclosed if desired.

Turning to schematic FIGS. 18 and 19, in another embodiment of theinvention, refrigerating modules 120 and 466 can be combined withrefrigeration/storage modules 460 and 472 in a distributed refrigerationappliance system that can include a central cooling unit 110 asillustrated in FIGS. 3 and 6. Refrigerating modules 120 and 466 can befree standing or built-in modules and can be general purposerefrigerator, freezer or special purpose modules and can be located in aresidential kitchen or other locations associated with a dwelling asdesired. Refrigerating module 120 can be similar to refrigerating module120 illustrated in FIG. 3, and accordingly, will use the same referencenumerals as refrigerating module 120 in FIG. 3. Alternately,refrigerating module could also be similar to combined satellite station240 illustrated in FIG. 8A. The central cooling unit 110, additionalsatellite stations 212 and other refrigeration appliance modules havenot been included in FIGS. 18 and 19 to simplify the drawings. Insulatedsupply conduits 142 and insulated return conduits 144 (see FIGS. 3 and6) can be connected to quick connect fittings 145 to provide arefrigerant circuit to evaporators 130 and 470 in refrigerating modules120 and 466 from a central cooling unit 110 (see FIGS. 3 and 6). Asnoted above, central cooling unit 110 can be located in a locationremote from a residential kitchen, or in or in proximity of theresidential kitchen as desired as those skilled in the art willunderstand.

Refrigerating module 466 can have an insulated cabinet 467 and aninsulated door 468 that can be hinged to insulated cabinet 467 forselective access to compartment 469 defined by insulated cabinet 467.Insulated door 468 can have a handle, not shown, to facilitate access tothe refrigerating appliance module 466. The central cooling unit, notshown, can be similar to central cooling unit 110 illustrated in FIGS. 3and 6. Operation of central cooling unit 110 and controller 150 aredescribed in detail above in connection with the embodiment of FIGS. 3and 6 and accordingly will not be described in detail again inconnection with FIGS. 18 and 19. Those skilled in the art willunderstand that more than one refrigerating module can be provided andthat one or more combined satellite station/refrigeration appliancemodules can be connected to central cooling unit 110 through quickconnect fittings 145 to refrigerant lines that can be insulated supplyconduits 142 and 144, and to controller 150 through control circuit 156as illustrated in FIG. 6.

Refrigerating module 466 can have a direct cooling satellite stationevaporator 470 and an expansion device 138. Evaporator 470 and expansiondevice 138 can be connected through quick connect fittings 145 torefrigerant lines that can be insulated supply conduit 142 and insulatedreturn conduit 144 and to controller 150 through control circuit 156(see FIGS. 3 and 6). Evaporator 470 can be positioned in compartment 469that those skilled in the art can include an evaporator compartment ifdesired. Refrigeration/storage module 460 can be located in proximity torefrigerating module 466 and can be connected to refrigerating module466 by an insulated supply duct 216 and an insulated return duct 218.Refrigeration/storage module 460 can have an insulated cabinet 462 thatcan have an insulated door 463 hinged to insulated cabinet 462 toselectively provide access to compartment 464. Refrigeration/storagemodule 460 can have a circulation fan 465 that can be positioned ininsulated supply duct 216 and that can circulate and control the volumeof chilled air flowing into refrigeration/storage module 460 fromrefrigerating module 466. Refrigerating module 466 andrefrigeration/storage module 460 can have temperature sensors 134 asdescribed above, and can have temperature selectors 136, not shown, thatcan be combined with the respective cabinets or can be part of a centraluser interface as described above. Temperature sensors 134 andtemperature selectors 136 can be connected to controller 150 (FIGS. 3and 6) through control circuit 156. Refrigeration/storage module 460 canselectively be operated as a refrigerated storage space when circulatingfan 465 is operated by controller 150 (FIGS. 3 and 6). Alternately,circulating fan 465 can be de-activated and refrigeration/storage module460 can be allowed to remain at the ambient temperature of the locationin the dwelling in which it is positioned. Circulating fan 465 can be avariable speed fan, or a single speed fan that can be cycled on and offto control the temperature in the refrigeration/storage module 460.

Refrigerating module 120 is described in detail above and accordinglywill not be described in detail again in connection with FIGS. 18 and19. Refrigeration/storage module 472 can be located in proximity torefrigerating module 120 and can be connected to refrigerating module120 by an insulated supply duct 216 and an insulated return duct 218similar to combined satellite station 240 illustrated in FIG. 8A.Refrigeration/storage module 472 can have an insulated cabinet 473 thatcan have an insulated door 474 hinged to insulated cabinet 473 toselectively provide access to compartment 475 defined by insulatedcabinet 473. Insulated door 474 can have a handle, not shown, tofacilitate access to the refrigerating appliance module 472.Refrigeration/storage module 472 can have a damper 476 that can controlthe volume of chilled air flowing into refrigeration/storage module 472from refrigerating appliance module 120. Refrigerating module 120 andrefrigeration/storage module 472 can have a temperature sensor 134 asdescribed above, and can have a temperature selector 136, not shown,that can be combined with the respective cabinets or can be part of acentral user interface as described above. Temperature sensors 134 andtemperature selectors 136 can be connected to controller 150 (FIGS. 3and 6) through control circuit 156. Refrigeration/storage module 472 canselectively be operated as a refrigerated storage space when damper 476is positioned to allow air flow form refrigerating module 120 to flowinto compartment 475 under the influence of evaporator fan 132. Thoseskilled in the art will understand that damper 476 can be manuallyadjustable by a user, or can be automatically adjustable under thecontrol of controller 150 (see FIGS. 3 and 6). Damper 476 is illustratedas connected via control circuit 156 to controller 150. Those skilled inthe art will understand than a manually adjusted damper 476 can be usedand, if so, would not need to be connected to controller 150.Alternately, damper 476 can be positioned to block flow of chilled airfrom refrigerating module 120 refrigeration/storage module 472 can beallowed to remain at the ambient temperature of the location in thedwelling in which it is positioned. Also, a second damper 476, notshown, can be positioned in insulated return duct 218 if desired toimprove isolation of refrigeration/storage module 472 when it is desiredto operate refrigeration/storage module 472 as an unconditioned storagespace.

As illustrated in FIG. 19, a second refrigeration/storage module 460 canbe connected to refrigeration/storage module 472 to provide two modulesconnected to one refrigerating module 120 that can alternately be usedfor refrigerated or ambient storage space. It can be advantageous toemploy a refrigeration/storage module 460 having a circulating fan 465remote from a refrigerating module 120 when it is desired to provide tworefrigeration/storage modules to facilitate air flow, indicated by airflow arrows 148, in both refrigeration/storage modules 475 and 460.Similarly, two refrigeration/storage modules 460 could be provided for arefrigerating module 120 or 466 since circulating fans 465 could provideadequate chilled air circulation in at least two refrigeration/storagemodules. Thus, in the embodiment of the invention illustrated in FIGS.18 and 19 a distributed refrigeration appliance system can have one ormore refrigeration/storage modules to allow temporary additionalrefrigerated storage space that, when not needed, can be converted toambient temperature storage space. Those skilled in the art willunderstand that a second damper, not shown, can be provided forinsulated return duct 218 to prevent chilled air from flowing into therefrigeration/storage module 460 or 472 when the user has de-activatedthe circulating fan 465 and/or closed damper 476 to operate one or morerefrigeration/storage modules as an ambient temperature storage space.Those skilled in the art will also understand that refrigeration/storagemodule 472 can be modified to be used in combination with arefrigerating module such as refrigerating module 120 without having asecond refrigeration/storage module 460 combined with it as illustratedin FIG. 19. In the event refrigeration/storage module is to be usedwithout a second refrigeration/storage module the insulated supply andreturn ducts 216 and 218 leading to refrigeration/storage module 460from refrigeration/storage module 472 can be eliminated.

Turning to schematic FIG. 20, in another embodiment of the invention,refrigerating module 120 can be used with refrigeration/storage module478 in a distributed refrigeration appliance system that can include acentral cooling unit 110 as illustrated in FIGS. 3 and 6. Refrigeratingmodule 120 can be a free standing or built-in module and can be generalpurpose refrigerator, freezer or special purpose module and can belocated in a residential kitchen or other locations associated with adwelling as desired. Refrigerating module 120 can be similar torefrigerating module 120 illustrated in FIG. 3, and accordingly, willuse the same reference numerals as refrigerating module 120 in FIG. 3.Alternately, refrigerating module could also be similar to combinedsatellite station 240 illustrated in FIG. 8A. The central cooling unit110, additional satellite stations 212 and refrigeration appliancemodules have not been included in FIG. 20 to simplify the drawings.Insulated supply conduits 142 and insulated return conduits 144 (seeFIGS. 3 and 6) can be connected to quick connect fittings 145 to providea refrigerant circuit to evaporator 130 in refrigerating module 120 froma central cooling unit 110 (see FIGS. 3 and 6). As noted above, centralcooling unit 110 can be located in a location remote from a residentialkitchen, or in or in proximity of the residential kitchen as desired asthose skilled in the art will understand.

Refrigeration/storage module 478 can have an insulated cabinet 479 thatcan have an insulated door 480 hinged to insulated cabinet 479 toselectively provide access to compartment 481 defined by insulatedcabinet 479. Insulated door 480 can have a handle, not shown, tofacilitate opening and closing insulated door 480 to access compartment481. Refrigeration/storage module 478 can be connected to refrigeratingmodule 120 by an insulated supply duct 216 and an insulated return duct218 and can have a damper 486 associated with insulated supply duct 216that can control the volume of chilled air flowing, see dashed air flowarrow 148, into refrigeration/storage module 478 from refrigeratingmodule 120. Refrigeration/storage module 478 can also have a selector482 that can be a switch connected to control circuit 156. In someembodiments of the invention the refrigeration/storage module cancomprise an insulated insert into a cabinet as will be described ingreater detail below. In such circumstances it can be advantageous toprovide a selector switch 482 to indicate the presence or absence of aninsulated insert to form insulated cabinet 479 to avoid operatingrefrigeration/storage module 478 at below ambient temperatures withoutan insulating insert in place. Those skilled in the art will understandthat selector switch can be arranged to be manually set by a user or canbe automatically closed to indicate the presence of an insulated insertupon positioning the insulated insert in the cabinet. A selector switch482 can also be provided in module 460 as illustrated in FIGS. 18 and19. Refrigerating module 120 and refrigeration/storage module 478 canhave temperature sensors 134 as described above, and can havetemperature selectors 136, not shown, that can be combined with therespective cabinets or can be part of a central user interface asdescribed above. Temperature sensors 134 and temperature selectors 136can be connected to controller 150 (FIGS. 3 and 6) through controlcircuit 156. Refrigeration/storage module 478 can selectively beoperated as a refrigerated storage space when damper 486 is positionedto allow chilled air to flow from refrigerating module 120. Damper 486can be manually adjustable by a user to control the operatingtemperature in compartment 481. Alternately, damper 486 can be arrangedto be operated by controller 150 (FIGS. 3 and 6) depending on thesetting of a temperature selector 136, not shown, controllingrefrigeration/storage module 478 and the temperature sensed bytemperature sensor 134. Alternately, damper 486 can be positioned toblock flow of chilled air from refrigerating module 120 andrefrigeration/storage module 478 can be allowed to remain at the ambienttemperature of the location in the dwelling in which it is positioned.Those skilled in the art will understand that insulated return duct 218can also be provided with a damper, not shown, to help assure thatchilled air does not flow from refrigerating module 120 when the userdesires to allow refrigeration/storage module to remain at ambienttemperature for additional storage space. Refrigeration/storage module478 can also have a heating element 484 that can be arranged to heat thecontents of refrigeration/storage module above ambient temperature.Heating element 484 can be connected through control circuit 156 tocontroller 150 for selective operation of heating element 484. Use ofheating element 484 can allow a user to select a temperature sequencecycle for the contents of refrigeration/storage module 478 that caninclude heating the contents to a temperature above ambient temperatureas will be described in detail below. Thus, in the embodiment of theinvention illustrated in FIG. 20 a distributed refrigeration appliancesystem can have one or more refrigeration/storage modules to allowtemporary additional refrigerated storage space that, when not needed,can be converted to ambient temperature storage space, or can beoperated to provide one or more predetermined temperature sequencecycles to treat the contents of compartment 481. While the embodimentsillustrated in FIGS. 18-20 have been described in combination withcentral cooling unit 110, those skilled in the art will understand thata secondary loop central cooling units 10, 60, 370 and 402 describedabove in detail could be employed with corresponding refrigerationappliance modules combined with refrigeration/storage modules asdescribed in the embodiments disclosed in FIGS. 18-20.

Turning to schematic FIGS. 21-23, in another embodiment of theinvention, a refrigeration apparatus 570 can be combined with arefrigeration/storage modules that can be arranged to selectivelyprovide additional refrigerated storage or unconditioned storage space.Refrigeration apparatus 570 can be a freestanding refrigeratingapparatus and can be positioned in a kitchen or other location in adwelling in relation to upper cabinets 488 and lower cabinets 489.Refrigeration apparatus 570 can be similar to a combined satellitestation/refrigeration appliance module/central cooling unit 282 asillustrated and described in FIG. 10, or can be similar to aconventional freestanding or a built in modular or stacked refrigeratorfreezer. As illustrated in FIGS. 21-23, refrigeration apparatus 570 willutilize the same numerals as combined satellite station/refrigerationappliance module/central cooling unit 282 illustrated in FIG. 10.Operation of combined satellite station/refrigeration appliancemodule/central cooling unit 282, partially shown in FIGS. 21-23, isdescribed in detail above and will not be repeated in connection withFIGS. 21-23.

Refrigeration/storage module 492 illustrated in FIG. 21 can include aninsulated cabinet 491 having an insulated door 493. Insulated door 493can have a handle, not shown, to facilitate access intorefrigeration/storage module 492. Refrigeration/storage module 492 canhave a temperature sensor 134 and a temperature selector 136, not shown,as described above and can be positioned adjacent upper cabinets 488.Temperature sensors 134 and temperature selectors 136 can be connectedto controller 300 (FIG. 10) through control circuit 306.Refrigeration/storage module 492 can include a selector 482, asdescribed above, connected to controller 300 (see FIG. 10), and can havedampers 486 that can be positioned in insulated supply duct 216 andinsulated return duct 218 that can connect combined satellite station282 with refrigeration/storage module 492. As described above, dampers486 can be adjusted to allow chilled air to flow intorefrigeration/storage module 492 or to block chilled air flow to allowrefrigeration/storage module to remain at ambient temperature asunconditioned storage space. Dampers 486 can be manually adjustable by auser to allow chilled air flow at a sufficient volume to maintain adesired temperature in the refrigeration/storage module 492, or can beautomatic dampers that can be connected to a controller 300 (FIG. 10) tocontrol the temperature in refrigeration/storage module 492 based oninput from a temperature sensor 134 and a temperature selector 136 (FIG.10).

Refrigeration/storage module 494 illustrated in FIG. 22 can include aninsulated cabinet 495 having an insulated door 495′. Insulated door 495′can have a handle, not shown to facilitate access intorefrigeration/storage module 494. Refrigeration/storage module 494 canhave a temperature sensor 134 and a temperature selector 136, not shown,as described above and can be positioned adjacent lower cabinets 489.Temperature sensors 134 and temperature selectors 136 can be connectedto controller 300 (FIG. 10) through control circuit 306.Refrigeration/storage module 494 can include a selector 482, asdescribed above, connected to controller 300 (see FIG. 10) and can havea damper 486 positioned in insulated supply duct 216 and a circulatingfan 457 positioned in insulated return duct 218. As noted above,refrigeration apparatus 570 can have a top mounted freezer compartmentand a bottom mounted above freezing refrigerator compartment oppositerefrigeration/storage module 494. Damper 486 can arranged to be manuallyadjustable by the user, or can be an automatic damper as described aboveto control the amount of chilled air flowing into refrigeration/storagemodule 494, and therefore the operating temperature. In the embodimentillustrated in FIG. 22, a circulating fan 457 can be provided ininsulated return duct 218 to assure circulation of chilled air, see airflow arrows 148, into refrigeration/storage module 494 from freestandingrefrigeration appliance 570 and back into freestanding refrigerationappliance 570.

In the embodiment illustrated in FIG. 23A, freestanding refrigerationappliance 570 can be similar to combined satellite station/refrigerationappliance module/central cooling unit 282 illustrated in FIG. 10, andcan have a refrigerating module 466 arranged to connect to centralcooling unit 284, not shown, (see FIG. 10). Refrigerating module 466 isdescribed above in detail in connection with FIG. 18 and accordinglywill not be described again in detail again in connection with FIG. 23A.Refrigerating module 466 can be positioned in place of a lower cabinet489 as illustrated in FIGS. 21-22. Refrigeration/storage module 496 canbe positioned adjacent refrigerating module 466 and can be connected torefrigerating module 466 by insulated supply duct 216 and insulatedreturn duct 218 and can have a circulating fan 465 associated withinsulated supply duct 216 to circulate chilled air from refrigeratingmodule 466 into compartment 499 when circulating fan 465 is operated.Circulating fan 465 can be connected to controller 300 (see FIG. 10)through control circuit 306. Refrigeration/storage module 496 can have atemperature sensor 134 and a temperature selector 136 as describedabove. Thus, a user can select refrigerated operation ofrefrigeration/storage module 496 by setting the appropriate selector 136for refrigeration/storage module 496 for refrigerating operation.Controller 300 (FIG. 10) can cause circulating fan 465 to operatecausing chilled air to circulate from refrigerating module 466 intorefrigeration/storage module 496 (see dashed air flow arrows 148).Refrigeration/storage module 496 can also have a heating element 484that can be similar to heating element 484 illustrated inrefrigeration/storage module 478 (see FIG. 20). Operation of heatingelement 484 in refrigeration/storage module 496 can be similar to theoperation of refrigeration/storage module 478 described above and willnot be repeated. As noted above, operation of heating element 484 toselectively provide a predetermined temperature profile for the contentsof refrigeration/storage module 496 will be described in detail below.

In the embodiment illustrated in FIG. 23B, freestanding refrigerationappliance 570 can be similar to combined satellite station/refrigerationappliance module/central cooling unit 282 illustrated in FIG. 10, andcan have a refrigerating module 466 arranged to connect to centralcooling unit 284, not shown, (see FIG. 10). Refrigerating module 466 isdescribed above in detail in connection with FIG. 18 and accordinglywill not be described again in detail in connection with FIG. 23B.Refrigerating module 466 can be positioned in place of a lower cabinet489 as illustrated in FIGS. 21-22. Refrigeration/storage module 496 isdescribed above in detail in connection with FIG. 23A and accordinglywill not be described again in detail. Refrigeration/storage module 492′illustrated in FIG. 23B can employ a secondary cooling medium circuit toselectively cool the interior of insulated cabinet 491 in lieu ofinsulated ducts 216 and 218 connecting insulated cabinet 491 withcompartment 308 as described above in connection with FIG. 23A. Thesecondary cooling medium circuit can include a heat exchanger 512 thatcan be positioned in compartment 308 in proximity of evaporator 320 toreject heat from insulated compartment 491 to compartment 308 andevaporator 320. Heat exchanger 512 can be connected with insulatedconduits 42 to heat exchanger 513 that can be positioned in insulatedcabinet 491 and a pump 514. Pump 514 is illustrated as being positionedin insulated compartment 491, however, pump 514 can be positioned inother locations as desired, including in central cooling unit space 311as desired. As described above the liquid coolant for the secondarycooling medium circuit, not shown, can be DYNALENE HC heat transferfluid, a water-based organic salt that is non-toxic, non-flammable withlow viscosity, or other liquid coolant solutions such as ethylene glycoland water solution. In operation, when a user elects to operaterefrigeration/storage module 492′ as refrigerated space, selector switch482 can be closed and pump 514 can operate under control of controller300 and a temperature sensor 134, not shown, to circulate liquid coolantthrough heat exchanger 513 to chill insulated cabinet 491. In order tooperate refrigeration/storage module 492′ as an unconditioned storagespace selector switch 482 can be opened and pump 514 de-energized toallow the temperature in insulated cabinet 491 to rise to the ambienttemperature. Insulated cabinet 491 can be a container forming a spacefor holding a liquid or slurry material such as water or ice cream orother liquid, semi-liquid or slurry materials that a user might chooseto cool or chill for use, or as a step in preparation. Insulated cabinet491 could take the form of an insulated tank or container, or could bean insulated space arranged to receive a removable liquid and/or slurrycontainer, not shown. Heat exchanger 513 can be positioned to chill aremovable liquid/slurry container, not shown. Those skilled in the artwill understand that modules other than refrigeration/storage module492′ can comprise, or be arranged to receive a tank or container forstoring and/or refrigerating a liquid or slurry material if desired.Similarly, refrigeration/storage module 492′ can be used in combinationwith satellite stations as illustrated in the embodiments of FIGS. 6-11as desired.

Those skilled in the art will understand that freestanding refrigerationappliance 570 can be configured as a bottom freezer apparatus having anevaporator in the lower part of the appliance and that accordingly, therefrigeration/storage modules 492, 492′ and 494 could be switched tocorrespond to the above freezing and below freezing compartments infreestanding refrigerating appliance 570. Further, while heatingelements have been illustrated in refrigeration/storage modules 478 and496, those skilled in the art will understand that heating elementscould be provided in any of the refrigeration/storage modulesillustrated in FIGS. 18, 19, 21 or 22. Thus, in the embodiment of theinvention illustrated in FIGS. 21-23B a distributed refrigerationappliance system can have one or more refrigeration/storage modulescombined with a freestanding refrigeration appliance to allow temporaryadditional refrigerated storage space that, when not needed, can beconverted to ambient temperature storage space, or if provided with aheating element can be used to heat the contents to above ambienttemperatures.

Insulated cabinets described above can be formed of wood, metal ormolded plastic and provided with insulating material such aspolyurethane foam or expanded Styrofoam as is well known in the art.Also as is well known in the art such insulated cabinets can be formedin a manufacturing location and shipped to a job site in final form, orcan be fabricated at the job site cutting and assembling cabinets frominsulated panels and preformed insulated doors. According to theinvention, an insulated cabinet and insulated door for arefrigeration/storage module can be formed by providing an insulatedinsert and insulated door kit to convert an uninsulated cabinet into arefrigeration/storage module. Turning to FIG. 24 that includes anexploded view of insulated insert 500, preparation of an insulatedinsert 500 can be seen. Insulated insert 500 can include an insulatedbox 502 and an insulated door 504 that can be attached to insulated boxby hinges 510. Insulated door can include a handle 511 to facilitateopening and closing insulated door 504. Insulated box 502 can include aninsulated back wall 505, insulated top wall 506, insulated bottom wall507, insulated left side wall 508 and insulated right side wall 509 thatcan be assembled into insulated box 502 as is well known in the cabinetindustry. Insulated insert 500 can be inserted into an upper cabinet 488or into a lower cabinet 489 into to convert a conventional cabinet intoa refrigeration/storage module. Those skilled in the art will understandthat instead of fabricating insulated insert 500 as an insert, aninsulated cabinet can be fabricated that can replace an upper cabinet488 or lower cabinet 489 if desired. If an insulated cabinet is to beconstructed instead of an insulated insert, panels having an acceptable“outer” surface can be used to match other cabinets used in the dwellingas desired. According to this aspect of the invention distributedrefrigeration modules can be provided to satisfy requirements for therefrigeration system by the intended user without requiring the user tosettle for module sizes generally available in the mass market forrefrigeration appliances. The construction described above for insulatedinsert 500 can be used for any of the refrigeration/storage modules 460,472, 478, 492, 492′, 494 and 496 described above if desired.

Turning to schematic FIGS. 25 and 26, in another embodiment of theinvention, a refrigeration apparatus 570 can be combined with arefrigeration/storage module that can be arranged to selectively provideadditional refrigerated storage or unconditioned storage space above orbelow refrigeration apparatus 570. Refrigeration 570 apparatus can be abuilt in or freestanding apparatus and can be positioned in a kitchen orother location in a dwelling in relation to upper cabinets 488 and lowercabinets 489. As described above in connection with FIGS. 21-23B,refrigeration apparatus 570 can be similar to a combined satellitestation/refrigeration appliance module/central cooling unit 282 asillustrated in FIG. 10, or can be similar to a conventional refrigeratorfreezer. Refrigeration apparatus 570 will not be described again indetail in connection with FIGS. 25 and 26.

In FIG. 25 refrigeration apparatus 570 can be installed on or above arefrigeration/storage module 515 to raise refrigeration apparatus 570 tofacilitate user access to the lower compartment of refrigerationapparatus 570 without undue bending. Refrigeration/storage module 515can include an insulated cabinet 516, insulated door 517, and if desireda selector 482 as described above. Refrigeration/storage module 515 canhave a temperature sensor 134, a temperature selector 136, not shown,and a diffuser 518 that can cooperate with insulated duct 519 connectingrefrigeration/storage module 515 with the lower compartment 310 ofrefrigeration apparatus 570. Insulated duct 519 can be a concentric ductor can be a two passage parallel duct to provide a supply and returnpassage to refrigeration/storage module 515. Temperature sensor 134 andtemperature selector 136, not shown, can be connected to controller 300(FIG. 10) through control circuit 306. Insulated door 517 can have ahandle, not shown, to facilitate access to refrigeration/storage module515. Insulated duct 519 can have a damper 486 to selectively allowchilled air from refrigeration apparatus 570 to flow intorefrigeration/storage module 515. Circulating fan 523 can assure thatchilled air from refrigeration/storage module 515 returns to compartment310 of refrigeration apparatus 570. As described above in detail,refrigeration/storage module 515 can be selectively operated asrefrigerated storage space by positioning damper 486 to allow chilledair to flow through insulated duct 519 and operating circulating fan523. As above, damper 486 can be manually operated by a user, or can bean automatic damper connected to controller 300 (see FIG. 10) throughcontrol circuit 306. Circulating fan 523 can be connected throughcontrol circuit 306 to controller 300 and can be operated when a userselects refrigerated operation of refrigeration/storage module 515.Likewise as described above in connection with other embodiments, a usercan allow refrigeration/storage module 515 to achieve ambienttemperature with damper 486 positioned to block flow of chilled air intorefrigeration/storage module 515 and circulating fan 523 de-energized.

Turning to FIG. 26, a refrigeration/storage module 520 can be positionedabove refrigeration appliance 570 in the space between the top ofrefrigeration appliance 570 and a softfit or the ceiling in the locationin the dwelling in which refrigeration appliance 570 is located.Refrigeration/storage module 520 can include an insulated cabinet 521,and insulated door 522 that can be hinged to insulated cabinet 521.Insulated door 522 can have a handle, not shown, to facilitate openingand closing insulated door 522. In FIG. 26 insulated door 522 isschematically illustrated as pivoting on a horizontal axis. Thoseskilled in the art will understand that insulated door 522 can be hingedto pivot on a vertical axis similar to insulated door 517 in FIG. 25 ifdesired. Refrigeration/storage module 520 can have a selector 482, asdescribed above, and can have a temperature sensor 134 and temperatureselector 136, not shown. Temperature sensor 134 and temperature selector136, not shown, can be connected to controller 300 (FIG. 10) throughcontrol circuit 306. An insulated supply duct 216 and insulated returnduct 218 can connect refrigeration/storage module 520 to refrigerationapparatus 570. Insulated supply and return ducts 216 and 218 can have adamper 486 to control flow of chilled air from refrigeration appliance570 to refrigeration/storage module 520 and back to refrigerationappliance 570. As described above, refrigeration appliance 570 can be acombined satellite station/refrigeration appliance module/centralcooling unit 282 (see FIG. 10) that can include an evaporator fan 322(see FIG. 10). The evaporator fan 322 can circulate chilled air throughinsulated supply 216 and return 218 ducts when dampers 486 arepositioned to allow air flow through the ducts. Dampers 486 can bemanually adjustable by a user to allow chilled air flow at a sufficientvolume to maintain a desired temperature in the refrigeration/storagemodule 520, or can be automatic dampers that can be connected to acontroller 300, not shown, to control the temperature inrefrigeration/storage module 520 under based on input from a temperaturesensor 134 and a temperature selector, both not shown. Thus, in FIGS. 25and 26 refrigeration/storage modules 515 and 520 can be combined with arefrigerating appliance 570 and that can be selectively operated asrefrigerated or ambient storage space to allow a user to have additionalrefrigerated or ambient temperature storage space as storage needschange.

As described in connection with FIGS. 20 and 23 a refrigeration/storagemodule can have a heating element 484 to allow a user to selectivelyraise the temperature in the module above the ambient temperature aswell as refrigerate the module to below ambient temperatures. In each ofthe embodiments the refrigeration/storage module can have a flowcontroller to allow or block flow of chilled air into therefrigeration/storage module, and as in the embodiments illustrated inFIGS. 20 and 23, can have a heating element that can be selectivelyenergized to heat the contents of the refrigeration/storage module. Theflow controller, damper 486 or circulating fan 465, and heating element484 can be connected to controller 300 (see Fig.10) through controlcircuit 306. System controller 300 can be arranged to selectivelyoperate at least one flow controller to allow chilled air to flowthrough at least one insulated duct to refrigerate the contents of therefrigeration/storage module to a desired below ambient temperature; orselectively operate the flow controller to block the flow of chilled airthrough at least one insulated duct to operate the refrigeration/storagemodule as an unconditioned (i.e. ambient temperature) storage space; orselectively operate the flow controller to block the flow of chilled airthrough the at least one insulated duct and selectively operate theheating element to heat the contents of the refrigeration/storage moduleto a desired above ambient temperature; or selectively operate the flowcontroller to allow or block the flow of chilled air into therefrigeration/storage module and selectively operate the heating elementto sequence the storage temperature of the contents of therefrigeration/storage module through a predetermined temperaturesequence cycle to cause physical or chemical effects in the contents ofthe refrigeration/storage module. For example, predetermined temperaturesequence cycles can include defrosting, fermentation, leavening, quickset cooling and rapid cool down.

Turning to FIG. 27A-27D illustration of time and temperature conditionsin four temperature sequence cycles can be seen. In FIG. 27A controller300 can be programmed to cause the temperature in arefrigeration/storage module to rise to a predetermined set temperatureto leaven the contents and then hold for a predetermined or open-endedtime. In FIG. 27B controller 300 can be programmed to hold the contentsof the refrigeration/storage module at a predetermined above ambient settemperature for a predetermined time to age or ferment the contents andthen reduce the temperature of the contents to a holding temperaturethat can be above or below ambient temperature. In 27C controller 300can elevate the temperature to defrost the contents and then hold thecontents at a reduced, above freezing, temperature. In FIG. 27Dcontroller can cause the temperature in refrigeration/storage module toquickly drop to chill the contents and then allow the temperature torise to a set temperature. In the programs illustrated in FIGS. 27B, 27Cand 27D the controller can be arranged to change from the higher tolower, or lower to higher temperatures based on elapsed time, or oninput from a temperature sensor or other sensor such as a humidity,carbon dioxide or hydrocarbon (such as ethylene or other food stuffgases caused by ripening or decay) sensor so that the predeterminedtemperature sequence cycle is dependent on the condition/changedcondition of the contents of the refrigeration/storage module. Thoseskilled in the art will understand that predetermined temperaturesequence cycles in addition to those illustrated in FIG. 27 anddescribed above can be used with refrigeration/storage modules describedabove. Likewise, those skilled in the art will understand that acontroller can be arranged to allow a user to program a desiredtemperature sequence cycle using a user interface or other well knownprogramming method.

Turning to FIGS. 28 and 29, a distributed refrigeration system accordingto the invention installed applied to a dwelling floor plan can be seenin schematic form. The residential dwelling 525 illustrated in FIGS. 28and 29 can have a kitchen 526, bath 528, office or den 530, living roomor family room 532 and patio 534. While a distributed refrigerationsystem according to the invention is illustrated in a simple dwelling inFIGS. 28 and 29, those skilled in the art will understand thatdistributed refrigeration systems according to the invention can be usedin combination with any style dwelling having any desired number ofrooms and floor plans. The distributed refrigeration system illustratedin FIGS. 28 and 29 can have a primary refrigeration machine, centralcooling unit 10, that can be similar to the central cooling unit 10illustrated and described in detail in connection with FIGS. 1, 12, 15,17A and 17B and will not again be described in detail in connection withFIGS. 28 and 29. Central cooling unit 10 can include a controller 50 andcan have temperature selectors 36 that can be located in a userinterface at a remote location such as in the kitchen 526 as illustratedin FIGS. 28 and 29. While temperature selectors 36 are illustrated in acombined user interface those skilled in the art will understand thattemperature selectors 36 can be combined with each remote refrigerationdevice if desired as is well known in the art. Central cooling unit 10can be connected to a secondary cooling medium circuit. In theembodiment illustrated in FIG. 28 a secondary cooling medium circuitcomprises insulated conduit 42 forming a loop leading from chilledliquid evaporator 40 in central cooling unit 10 around the perimeter ofdwelling 525 and back to chilled liquid evaporator 40. As describedabove in detail pump 44 can circulate liquid coolant through insulatedconduits 42. While insulated conduit 42 is positioned in perimeter wallsin FIGS. 28 and 29, those skilled in the art will understand thatinsulated conduits 42 can be located in other walls and/or portions ofthe dwelling as desired to provide access to the secondary refrigerationloop at desired locations in the dwelling. A pressure differential valve541 can be provided in the secondary cooling medium circuit to adjustany pressure differential between supply and return pressures. Thesecondary cooling medium circuit, also referred to as secondaryrefrigeration loop, can include a plurality of access points 535 (FIG.28) and 535′ (FIG. 29). An enlarged view of an access point 535 can beseen in FIG. 28A. Access point 535 can include a housing 533 than canenclose conduits 42 and can support remote device connectors 543 when aremote refrigeration device is connected to an access point. Remotedevice connectors 543 can be well known connectors for use with liquidcoolant circuits and can be quick connect or permanent connections asdesired. Access point 535 can also include an electrical connector, notshown, to make a suitable connection between control circuit 56 and theelectrical component(s) in the remote refrigeration device. Access point535 can also include a valve 545 that can be connected to controlcircuit 56. Valve 545 can open to allow chilled liquid refrigerant toflow into a remote refrigeration device when activated by controller 50.While central cooling unit 10 is shown in FIGS. 28 and 29, those skilledin the art will understand that an absorption central cooling unit asillustrated in FIG. 14 or a Stirling cycle central cooling unit asillustrated in FIG. 16 can be employed in the embodiments of FIGS. 28and 29 as desired.

A variety of remote refrigeration devices can be connected to thesecondary cooling medium circuit to provide distributed refrigerationfor various purposes at spaced locations in a dwelling. Following areexamples of remote refrigeration devices that can be utilized. Thoseskilled in the art will understand that the following examples are justthat and that the examples should not be understood as limiting theinvention to the remote refrigeration devices illustrated in FIGS. 28and 29. One remote refrigeration device can be refrigerating module 20located on patio 534. Refrigerating module 20 can be a patio cooler forbeverages or refrigerated snacks. Refrigerating module 20 can be similarto refrigerating module 20 disclosed in connection with FIGS. 1, 12, 14,16, 17A and 17B and will not be described again in detail in connectionwith FIGS. 28 and 29. Refrigerating module 20 can be connected to anaccess point 535 and 535′ as described above and can operate asdescribed above. Another remote refrigeration device can be arefrigerating module 384 combined with a cascade cooling unit 400.Refrigerating module 384 and cascade cooling unit 400 can be similar torefrigerating module 384 and cascade cooling unit 400 described indetail in connection with Fig.15 and will not be described again indetail. Cascade cooling unit 400 can be connected with remote deviceconnectors at access point 535 and 535′ and can operate as describedabove in connection with FIG. 15. Another remote refrigeration devicecan be dehumidifier 546 that can be employed to reduce the humidity inbath 528 that can be generated during showers or baths. Dehumidifier 546can be similar to refrigerating modules described above and can includea heat exchanger 548, a heat exchanger fan 549, a temperature sensor 34and a humidistat 547. Heat exchanger fan 549, temperature sensor 34 andhumidistat 547 can be connected to controller 50 through control circuit56. Heat exchanger 548 can be connected to insulated conduits 42 inaccess point 535 and 535′ utilizing remote device connectors 543 asdescribed above. Dehumidifier 546 can have a condensate bucket, notshown, or can be connected to a drain for disposal of condensate as iswell known in the art. Instead of connecting temperature sensor 34 andhumidistat 547 to controller 50, a control panel, not shown, can beprovided on dehumidifier 546 as will be readily understood by thoseskilled in the art. Another remote refrigeration device can be a CPUcooler 552 that can be arranged to cool a central processor of acomputer or server. CPU cooler can include a heat exchanger 554 and atemperature sensor 34. CPU cooler 552 can connect to the secondarycooling medium circuit utilizing remote device connectors 543 to connectto an access point 535 and 535′. Temperature sensor 34 can connect tocontroller 50 via a suitable electrical connector in control circuit 56in access point 535 and 535′. Another remote refrigeration device can bea local area cooler 556 that is illustrated in living room or familyroom 532. Local area cooler 556 can provide air conditioning orsupplemental air conditioning for a room or portion of dwelling 525. Forexample, dwelling 525 may be located in a climate that does not requirewhole house or central air conditioning, but cooling for part of a dayor part of the year can be satisfactorily addressed with a local areacooler 556 instead of a room air conditioner. Local area cooler 556 canhave a cabinet 557 that can enclose a heat exchanger 558 and heatexchanger fan 560. Local area cooler 556 can include a temperaturesensor 34 and temperature selector 36 that can be connected tocontroller 50, or alternately can be accessed on a control panel oncabinet 557 to control the local area cooler 556 at the device. Localarea cooler 556 can be connected to access point 535, 535′ utilizingremote device connectors 543 as described above. Local area cooler 556can operate similar to a room air conditioner and can include acondensate pan for collecting condensate or can have a condensate drainline that can be connected to a dwelling drain line or can be directedoutside for disposal as desired.

A second primary refrigeration machine can be connected to the secondaryrefrigeration loop to provide an additional source of cooling in thesecondary cooling medium circuit. In the embodiment illustrated in FIGS.28 and 29 the second primary refrigeration machine can be a chestfreezer 536. Chest freezer 536 can have an insulated cabinet 537 and afreezer cooling circuit including a static evaporator 538, expansiondevice 539, condenser 540, compressor 542 and condenser fan 550. Chestfreezer 536 can also have a heat rejecting element that can be a chilledliquid evaporator 544 that can be connected to insulated conduits 42 atan access point 535, 535′ utilizing remote device connectors 543 thatcan provide additional cooling in the secondary refrigeration loop.Chest freezer 536 can also have a temperature sensor 34 and temperatureselector 36 that can be connected to controller 50 through controlcircuit 56 as described above. Those skilled in the art will understandthat chest freezer 536 can have a suitable insulated lid or closure, notshown, and that temperature selector 36 can be positioned on a controlpanel on chest freezer 536 if desired instead of on a remote userinterface as illustrated. When chest freezer 536 is operating suctionline heat exchanger or chilled liquid evaporator 544 can absorb heatfrom liquid coolant being circulated in insulated conduits 42 thussupplementing the refrigerating capacity of the distributedrefrigeration system. Further, the freezer cooling circuit can include abypass valve 551 that can be integrated with the expansion device 539connected to control circuit 56 that can allow central controller 50 tobypass evaporator 538 to make the cooling capacity of chest freezer 536available in chilled liquid evaporator 544 to provide additional coolingfor the distributed refrigeration system. While a secondary primaryrefrigeration machine is illustrated as a chest freezer in theembodiments of FIGS. 28 and 29, those skilled in the art will understandthat other refrigeration machines such as a central air conditionercondensing unit, other configuration freezers as well as refrigeratorfreezers, ice makers, wine coolers and the like having a cooling unitcan be used as an additional primary refrigeration machine in adistributed refrigeration system if desired.

In the embodiment illustrated in FIG. 29 and FIG. 29A the secondarycooling medium circuit can have a single insulated conduit 42 connectingthe access points 535′ with the chilled liquid evaporator 40 and pump44. Access points 535′ can have a housing 564 and can include a valve566 that can be connected to controller 50 through control circuit 56.Valve 566 can close forcing chilled liquid cooling circulating ininsulated conduit 42 to divert through the remote device when valve 566is closed by controller 50. Access point 535′ can have a suitableelectrical connector, not shown, to facilitate connection of remoterefrigeration devices to controller 50. The single line secondarycooling medium circuit illustrated in FIG. 29 can otherwise operatesimilar to the two line supply and return line system illustrated inFIG. 28.

The refrigerating modules, refrigeration/storage modules, satellitestations, combined satellite stations and central cooling unitsdescribed above have been selected to explain the invention. However,the invention is not limited to the specific examples of modules,satellite stations and central cooling units and that these elements cantake any desired form and can be combined as desired within the scope ofthe invention. The invention is not limited to refrigeration modules andequipment located in any particular geometrical orientation. The centralcooling unit and receiving modules need not be positioned on the same orsimilar horizontal plane since appropriate pumps and fans can adjust fordifferences in elevation resulting from desired location of coolingunits and modules. While use of quick connect fittings to connectsatellite stations to refrigerant lines in the distributed refrigerationsystems is described above, those skilled in the art will understandthat quick connect fittings are not necessary to practice the inventionsdescribed in this application and that instead any well knownrefrigerant line connection arrangements can be used as desired.

The controllers for the central cooling units, refrigerating modules,satellite stations, combined satellite stations and central coolingunits and refrigeration/storage modules described above, including thecontrol circuits, thermostats, temperature selectors and selectorswitches, can be arranged to function as plug-n-play controls,components and devices, or can be arranged to function as part of anappliance network that can be part of a home network. Co-pendingInternational Applications PCT/2006/022420, Software Architecture Systemand Method for Communication with, and Management of, at Least OneComponent Within a Household Appliance, filed on Jun. 8, 2006;PCT/2006/022503, Components and Accessories for a CommunicatingAppliance, filed on Jun. 9, 2006; and PCT/2006/022528, ComprehensiveSystem for Product Management, filed Jun. 9, 2006; and U.S. patentapplication Ser. No. 11/619,767, Host and Adaptor for Docking a ConsumerElectronic Device In Discrete Orientation, filed on Jan. 4, 2007, allassigned to the assignee of this application, disclose architecturalelements for plug-n-play controls and modular systems that can be usedin the practice the inventions described in this application. Co-pendingInternational Applications PCT/2006/022420, PCT/2006/022503,PCT/US2006/022528 and co-pending U.S. patent application Ser. No.11/619,767 are incorporated herein by reference in their entirety.

While the invention has been specifically described in connection withcertain specific embodiments thereof, it is to be understood that thisis by way of illustration and not of limitation, and the scope of theappended claims should be construed as broadly as the prior art willpermit.

1. A distributed refrigeration appliance system constructed and arrangedfor use in a residential kitchen and other locations associated with aresidential dwelling comprising: a plurality of separate refrigerationappliance modules each having: an insulated compartment comprising acabinet and at least one insulated door for covering and uncovering anopening in the insulated cabinet; and an apparatus for receiving acooling medium for primary stage cooling of the interior of theinsulated compartment; a central cooling unit for removing heat from thecooling medium comprising: a vapor compression condensing unit having acompressor, condenser and an evaporator, the cooling medium comprisingchilled air; a cooling medium circuit comprising: insulated ductsconnecting the central cooling unit evaporator and the plurality ofrefrigerating modules for supplying chilled air to the plurality ofrefrigerating modules and returning air from the refrigerating modulesto the central cooling unit; the apparatus for receiving a coolingmedium comprising air inlets from the insulated ducts leading to therespective refrigeration appliance modules and air outlets leading fromthe respective refrigeration appliance modules to the insulated ducts; aplurality of cooling medium flow control devices connected in thecooling medium circuit comprising baffles for the respectiverefrigeration appliance modules for controlling the flow of chilled airflowing into the respective refrigeration appliance modules through theair inlets; and wherein at least one of the refrigeration appliancemodules further comprises a thermal cascade cooling system to cool atleast a portion of the at least one refrigeration appliance module to alower temperature than can be achieved in the primary stage cooling ofthe at least one refrigeration appliance module.
 2. The distributedrefrigeration appliance system according to claim 1, wherein the thermalcascade cooling system is selected from the group consisting of a vaporcompression cooling system, a thermoelectric cooling system, anadsorption cooling system, and a Stirling cycle cooling system.
 3. Thedistributed refrigeration appliance system according to claim 2, whereinthe thermal electric cooling system comprises a thermoelectric coolingsystem.
 4. The distributed refrigeration appliance system according toclaim 1, wherein the at least one refrigeration appliance modulecomprises two compartments and the thermal cascade cooling system isarranged to cool one of the compartments to a temperature than can beachieved in the primary stage cooling of the at least one refrigerationappliance module.
 5. The distributed refrigeration appliance systemaccording to claim 1, wherein the plurality of separate refrigerationappliance modules further comprise: a temperature selector arranged toset the desired temperature in the insulated compartment; and atemperature sensor arranged for sensing the temperature in the insulatedcompartment.
 6. The distributed refrigeration appliance system accordingto claim 5, further comprising a controller connected to the centralcooling unit, the temperature selectors and the temperature sensors tocontrol the temperatures in the respective refrigeration appliancemodule insulated compartments.
 7. A distributed refrigeration appliancesystem in at least a kitchen in a residential dwelling comprising: aplurality of separate refrigeration appliance modules each having: aninsulated compartment comprising cabinet and at least one insulated doorfor covering and uncovering an opening in the cabinet; a temperatureselector arranged to set the desired temperature in the insulatedcompartment, a temperature sensor arranged for sensing the temperaturein the insulated compartment, a heat exchanger for receiving liquidcoolant, and a liquid coolant control valve connected to the heatexchanger; a central cooling unit for chilling liquid coolant; a systemcontroller connected to the cooling unit, the temperature selector, thetemperature sensor and the control valve of the respective refrigerationappliance modules; a liquid coolant circuit connecting the centralcooling unit with the plurality of refrigeration appliance module heatexchangers and a pump to supply chilled liquid coolant from the centralcooling unit to the plurality of refrigeration appliance module heatexchangers and to return liquid coolant to the central cooling unit forcooling of the refrigeration appliance modules; the coolant controlvalves of the respective refrigeration appliance modules being connectedin the liquid coolant circuit for controlling flow of liquid coolant tothe respective refrigeration appliance module heat exchangers to controlthe temperature in the respective refrigeration appliance moduleinsulated compartments; and an additional refrigeration appliancecomprising: an insulated refrigeration cabinet and at least oneinsulated door for covering and uncovering an opening in the cabinetdefining an insulated refrigeration compartment; a temperature selectorarranged to set the desired temperature in the insulated refrigerationcompartment; a temperature sensor arranged for sensing the temperaturein the insulated refrigeration compartment; a vapor compression coolingsystem having a compressor, a liquid cooled condenser connected to theliquid coolant circuit to reject heat to the liquid coolant, anevaporator to selectively cool the insulated refrigeration compartment,and an expansion device connected to the evaporator and liquid cooledcondenser; and a refrigeration appliance controller connected to thetemperature selector, the temperature sensor and the compressor tooperate the vapor compression cooling system to provide a selectedtemperature in the refrigeration compartment that can be lower than thetemperature than can be achieved in the plurality of refrigerationappliance modules connected in the liquid coolant circuit.
 8. Thedistributed refrigeration appliance system according to claim 7, whereinthe central cooling unit is selected from the group consisting of avapor compression system including a compressor, an evaporator and asecondary loop heat exchanger to chill the liquid coolant, a Stirlingcycle cooler including a secondary loop heat exchanger to chill theliquid coolant and an absorption system cooler including a secondaryloop heat exchanger to chill the liquid coolant.
 9. The distributedrefrigeration appliance system according to claim 7, wherein theadditional refrigeration appliance controller is connected to the systemcontroller.